Answer questions 1–36 on your answer sheet. You may use a...

40
©Curriculum Associates, LLC Copying is not permitted. 40 North Carolina Assessment 2 Assessment 2 Calculator-Active Section Answer questions 1–36 on your answer sheet. You may use a calculator. 1 There are approximately 3.16 3 10 7 seconds in a year. What is this number in standard form? A 316,000,000 B 31,600,000 C 3,160,000 D 316,000 2 Two functions are shown below. Each describes the height of a tree in Marco’s back yard. Function 1: When Marco’s family moved into their current home, a pine tree in their back yard was 4 feet tall. It has since been growing at a rate of 3 feet per year. Function 2: The height in feet, h, of an oak tree in Marco’s back yard can be modeled by the equation h 5 2t 1 5, where t is the number of years since Marco’s family moved into their current home. Which statement correctly compares the two functions? A Function 1’s rate of change is 1 foot per year greater than function 2’s rate of change, and its initial value is 1 foot less. B Function 1’s rate of change is 2 feet per year greater than function 2’s rate of change, and its initial value is 2 feet less. C Function 2’s rate of change is 1 foot per year greater than function 1’s rate of change, and its initial value is 1 foot less. D Function 2’s rate of change is 2 feet per year greater than function 1’s rate of change, and its initial value is 2 feet less.

Transcript of Answer questions 1–36 on your answer sheet. You may use a...

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Assessment 2

Calculator-Active Section

Answer questions 1–36 on your answer sheet. You may use a calculator.

1 There are approximately 3.16 3 107 seconds in a year. What is this number in standard form?

A 316,000,000

B 31,600,000

C 3,160,000

D 316,000

2 Two functions are shown below. Each describes the height of a tree in Marco’s back yard.

• Function 1: When Marco’s family moved into their current home, a pine tree in their back yard was 4 feet tall. It has since been growing at a rate of 3 feet per year.

• Function 2: The height in feet, h, of an oak tree in Marco’s back yard can be modeled by the equation h 5 2t 1 5, where t is the number of years since Marco’s family moved into their current home.

Which statement correctly compares the two functions?

A Function 1’s rate of change is 1 foot per year greater than function 2’s rate of change, and its initial value is 1 foot less.

B Function 1’s rate of change is 2 feet per year greater than function 2’s rate of change, and its initial value is 2 feet less.

C Function 2’s rate of change is 1 foot per year greater than function 1’s rate of change, and its initial value is 1 foot less.

D Function 2’s rate of change is 2 feet per year greater than function 1’s rate of change, and its initial value is 2 feet less.

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3 Consider the graph below.

x

y

10

2

3

-1

-2

-3

-4

-5

-6

-1-2-3 2 3 5 6 7 8

1

5

6

4

4

What is the equation of the line?

A y 5 6 } 7 x 2 3

B y 5 7 } 6 x 2 3

C y 5 6 } 7 x 1 3

D y 5 7 } 6 x 1 3

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4 Approximately how much air is needed to fill an exercise ball with a radius of 15 in.? Use 3.14 for p. Use the following formula.

V 5 4 } 3 pr3

A 42,390 in.3

B 14,130 in.3

C 10,598 in.3

D 3,375 in.3

5 Which equation forms a pair of linear equations with 12a 1 4b 5 16 such that the system has exactly one solution?

A 3a 1 b 5 4

B 3a 2 b 5 8

C 3a 1 b 5 8

D 23a 2 b 5 24

6 The table models the amount of cold medicine Meg took on each of 3 days. What is the rate of change?

Day Dosage (mg)

0 60

2 50

4 40

A 25 mg per day

B 210 mg per day

C 10 mg per day

D 5 mg per day

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7 A teacher asked four students to estimate the diameter of the cap on a jug of milk. Jack answered 25 3 1023 kilometers, Lilly answered 25 3 1023 meters, Diego answered 25 3 1023 centimeters, and Willa answered 25 3 1023 millimeters.

Who gave the correct answer?

A Jack

B Lilly

C Diego

D Willa

8 Three tennis balls, each with a diameter of 2.5 inches, are placed inside a cylindrical can with a diameter of 2.7 inches and a height of 8.5 inches. Approximately how much free space is left in the can? Use the formulas below.

8.5 in.

2.7 in.

2.5 in.

[not drawn to scale]

V(cylinder) 5 pr2h

V(sphere) 5 4 } 3 pr3

A 10 in.3

B 14 in.3

C 24 in.3

D 43 in.3

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9 Every time x increases by 4, y increases by 3, and when x is 8, y is 7. Which equation models the relationship between x and y?

A y 5 1 3 } 4 2 x 1 1

B y 5 1 3 } 4 2 x 1 7

C y 5 1 4 } 3 2 x 1 1

D y 5 1 4 } 3 2 x 1 7

10 Refer to the figure below.

12 (6w + 8)

4(w – 7)

If the figure is a square, what is the value of w?

A 232

B 224

C 15

D 32

11 What is the distance between the points (2, 15) and (9, 21)?

A 13 units

B Ï··· 13 units

C Ï··· 85 units

D 85 units

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12 The table and graph below show data about the time spent reading and the number of pages read by Danika and Kevin.

READING DATA FOR DANIKA

Time (hours) Number of Pages

3 120

6 240

4 160

500

450

400

350

300

250

200

150

100

50

1 2 3 4 5 6 7 8 9 100

y

x

Time (in hours)

READING DATA FORKEVIN

Nu

mb

er o

f Pa

ges

(10, 450)

(2, 90)

(5, 225)

Which statement correctly compares the reading speed of Danika and Kevin?

A Each hour, Kevin reads 10 pages less than Danika.

B Each hour, Kevin reads 10 pages more than Danika.

C Each hour, Kevin reads 5 pages less than Danika.

D Each hour, Kevin reads 5 pages more than Danika.

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13 Consider the two functions below.

• Function 1: Savings Account.

Pascal starts with $100 in a savings account. He adds $50 per month. Let y be the balance in his savings account as a function of the number of months, x.

x y

0 100

2 150

3 200

4 250

5 300

• Function 2: Paying a Debt.

Rafael borrows $500 from his father. He agrees to pay his father $50 per month. Let R be the balance Rafael owes his father as a function of the number of months, m. The equation that models this situation is R = 500 2 50m.

Which description best describes the rate of change of each function?

A Function 1: positive, Function 2: negative

B Function 1: positive, Function 2: positive

C Function 1: negative, Function 2: positive

D Function 1: negative, Function 2: negative

14 What is the value of [(22)2]3 1 34? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

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15 Which graph best models the line of best fit for the data in the scatter plot?

x

y

x

y

x

y

A C

x

y

x

y

B D

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16 Joachim wants to build a cube-shaped planter to hold 216 cubic inches of soil. How long should he make each side?

A 3 Ï···· 216 inches

B Ï···· 216 inches

C 3 3 Ï···· 216 inches

D 3 Ï···· 216 inches

17 What is the length of the diagonal of the rectangular prism represented by the dashed line in the figure below?

7 in.

4 in.

3 in.

[not drawn to scale]

A Ï··· 14 inches

B Ï··· 74 inches

C Ï··· 84 inches

D Ï···· 116 inches

18 Simplify.

(47)3 ? (424 )2

A 42

B 48

C 413

D 415

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19 An athletic department sold 454 tickets to a sporting event. Adults paid $3.50 per ticket, and students paid $1.00. The total ticket sales were $1,154. If 20 more adult tickets and 20 fewer student tickets had been sold, how much money would have been collected for adult tickets and student tickets?

A $910 would have been collected for adult tickets, and $194 would have been collected for student tickets.

B $980 would have been collected for adult tickets, and $174 would have been collected for student tickets.

C $1,050 would have been collected for adult tickets, and $154 would have been collected for student tickets.

D $1,120 would have been collected for adult tickets, and $134 would have been collected for student tickets.

20 Justin is marking a border for a garden. He walks 200 feet to the east, then turns and walks 120 feet due south, before finally walking in a straight line back to his original starting point. To the nearest foot, how far does Justin walk in all? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

21 Which irrational number has a value greater than Ï··· 14 ?

A Ï··· 15

B Ï··· 13

C Ï··· 12

D Ï··· 11

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22 Mr. Richards gave the table shown below to four of his students, and asked them to determine the y-intercept of the function.

x y24 0

22 21

4 24

Luis answered 28, Natasha answered 26, Grayson answered 22, and Kaylee answered 21. Which student answered correctly?

A Luis

B Natasha

C Grayson

D Kaylee

23 There are approximately 40,000 people living in North Hamburg. The population of Diggsville is approximately 2 3 105 people. Robbie rewrites the population of North Hamburg in scientific notation and estimates that there are about twice as many people living in North Hamburg as in Diggsville. Which statement best describes Robbie’s conclusion?

A It is correct.

B It is incorrect; the population of North Hamburg is about 20 times as great.

C It is incorrect; the population of Diggsville is about 2 times as great.

D It is incorrect; the population of Diggsville is about 5 times as great.

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24 In square ABCD below, the distance between point A and point C is 6 units.

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-2 -1 1 2 3 4 5 6 7 8 9 100

2

1

y

x

C

D

B

AFigure 1

What is the area of square ABCD?

A 36 square units

B 18 square units

C 9 square units

D 6 square units

25 Consider the equation below.

2(b 2 5) 1 14 5 5b 2 3(b 1 8)

What is the solution to the equation?

A The equation has no solution.

B The equation has an infinite number of solutions.

C b 5 0

D b 5 224

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26 The table shows the numbers of wins and losses Ali’s softball team had while playing on its home field and on its opponents’ fields.

Home Field Opponents’ Field

Wins 15 9

Losses 6 12

Approximately what percentage of the games on its opponents’ fields did Ali’s team lose?

A 38%

B 43%

C 57%

D 67%

27 Kendall transformed the equation 1 } 3 (5x 2 15 1 4x) 5 1 1 3x 1 4 into a simpler form as shown.

1 } 3 (5x 2 15 1 4x) 5 1 1 3x 1 4

1 } 3 (9x 2 15) 5 3x 1 5

3x 2 5 5 3x 1 5

3x 2 3x 5 25 1 5

0 5 0

Which statement is correct?

A Kendall made a mistake; the equation has no solution.

B Kendall did everything correctly; the equation has no solution.

C Kendall made a mistake; the equation has an infinite number of solutions.

D Kendall did everything correctly; the equation has an infinite number of solutions.

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28 The amount of orange juice in a bottle is modeled by the equation y 5 128 2 8x. If y is the number of ounces of juice left and x is the number of servings of juice poured from the bottle, how many ounces of juice are in an unopened bottle? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

29 In the figure below, lines m and n are parallel.

nm

Which statement is correct about the two triangles in the figure?

A They must be neither congruent nor similar, because although vertical angles are congruent, alternate interior angles are not congruent when parallel lines are cut by a transversal.

B They must be neither congruent nor similar, because although alternate interior angles are congruent when parallel lines are cut by a transversal, vertical angles are not congruent.

C They must be congruent, because vertical angles are congruent, and so are alternate interior angles when parallel lines are cut by a transversal.

D They must be similar, because vertical angles are congruent, and so are alternate interior angles when parallel lines are cut by a transversal.

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30 Which expression is approximately equal to the expression below?

(3.71 3 107) 4 (8.2 3 104)

A 4.524 3 102

B 4.524 3 103

C 4.524 3 104

D 4.524 3 105

31 Use the table below.

x y

10 59

15 58

16 57

25 54

30 52

33 50

37 48

45 44

50 39

Which equation could model the line of best fit for the data?

A y 5 2 1 } 2 x 1 55

B y 5 1 } 2 x 1 55

C y 5 2 1 } 2 x 1 65

D y 5 1 } 2 x 1 65

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32 Which value of y will make y 3 5 27 a true statement?

A 3

B 9

C 81

D 162

33 The table below lists the lengths of vines of different amounts of time after planting. The line of best fit for the data is y 5 0.48x 2 2.97.

Days After Planting

Vine Length (centimeters)

10 2.7

15 4.4

20 6.3

25 8.5

30 10.9

35 13.6

40 16.4

45 19.6

What is the meaning of the slope of the equation?

A For every decrease in number of days by 1, the vine length decreases by 1 centimeter.

B For every decrease in number of days by 1, the vine length decreases by 2.97 centimeters.

C For every increase in number of days by 1, the vine length increases by 1 centimeter.

D For every increase in number of days by 1, the vine length increases by 0.48 centimeter.

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34 Leora created the table below to show how her family shared photographs over the past year.

Color Black & White

Printed 75 25

Shared Online 150 5

Of the photographs that Leora’s family shared, what percent were color photos that were shared online? Round your answer to the nearest tenth. Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

35 The diameter of a red blood cell is approximately 0.0007 centimeters. Which expression represents the diameter?

A 7 3 104 cm

B 7 3 103 cm

C 7 3 1023 cm

D 7 3 1024 cm

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36 Look at the figure PQRS.

-1

-2

-2 -1 1 2 3 4 5 6 7 8 9 100

10

9

8

7

6

5

4

3

2

1

y

x

S R

Q

P

With a center of dilation at (0, 0) and a scale factor of 0.5, what are the coordinates of the vertices of the image P’Q’R’S’?

A P’(1.5, 1.5), Q’(2.5, 1.5), R’(2.5, 3.5), S’(0.5, 3.5)

B P’(2.5, 2.5), Q’(6.5, 4.5), R’(6.5, 8.5), S’(2.5, 8.5)

C P’(4, 4), Q’(12, 8), R’(12, 16), S’(4, 16)

D P’(1, 1), Q’(3, 2), R’(3, 4), S’(1, 4)

STOP

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Calculator-Inactive Section

Answer questions 37–65 on your answer sheet. You may NOT use a calculator.

37 Between which two decimals does Ï··· 31 lie?

A 5.4 and 5.5

B 5.5 and 5.6

C 5.6 and 5.7

D 5.7 and 5.8

38 Figure A and its image after a transformation, Figure A’, are shown on the coordinate plane below.

-1

-2

-3

-4

-5

-6

-6 -5 -4 -3 -2 -1 1 2 3 4 5 60

6

5

4

3

2

1

y

x

Figure A

Figure A’

Which transformation to Figure A demonstrates its congruence to Figure A’?

A a rotation of 180° about the origin

B a reflection over the line y 5 x

C a reflection over the y-axis

D a translation of 8 units to the right and 4 units up

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39 What is the decimal equivalent of 21 }} 99

?

A 0.2 ·· 1

B 0. ··· 21

C 0. ··· 23

D 0.2 ·· 3

40 Which linear equation is graphed below?

6

8

10

4

21

3

5

7

9

0 1 2 3 4 5 6 7 8 9 10

(2, 7)

(8, 4)

x

y

A y 5 2 1 } 2 x 1 8

B y 5 2 3 }} 10 x 1 76 }} 8

C y 5 2 3 } 5 x 2 8

D y 5 2 2 } 5 x 2 8

41 Consider the graph below.

10

9

8

7

6

5

4

3

2

1

1 2 3 4 5 6 7 8 9 100

y

x

Line a

Line b

Which point is the solution to the system of equations represented by the lines?

A (3, 7)

B (4, 7)

C (7, 3)

D (7, 4)

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42 Laura is deciding whether an equation relating x and y is a function. Which statement tells her that the equation must be a function?

A The equation relates every possible x-value to two y-values.

B The equation relates an x-value to every possible y-value.

C The equation relates each x-value to only one y-value.

D The equation relates two x-values to the same y-value.

43 In the graph below, time is shown on the x-axis, and speed is shown on the y-axis. The slope of the graph at any point gives the acceleration at that time.

A B C EDTime

Speed-Time Graph

Spee

d

Fx

y

What is happening from B to C ?

A The speed is increasing, and the acceleration is increasing.

B The speed is increasing, but the acceleration is decreasing.

C The speed is decreasing, but the acceleration is increasing.

D The speed is decreasing, and the acceleration is decreasing.

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44 In which scatter plot are the data points clustered?

x

y

x

y

A C

x

y

x

y

B D

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45 Refer to the graph below.

x

y

10

1

2

3

4

5

6

7

8

9

10

-1

-2

-3

-1-2-3-4-5-6-7-8-9-10 2 3

P

Q

R

Which set of coordinates results gives the vertices of the similar triangle that results when DPQR is translated 1 unit up and 3 units to the right?

A P’(1, 1), Q’(2, 23), R’(2, 0)

B P’(1, 3), Q’(2, 21), R’(23, 2)

C P’(25, 3), Q’(24, 21), R’(29, 2)

D P’(25, 1), Q’(24, 23), R’(29, 0)

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46 The table below lists ordered pairs of a function.

x y

2 4

4 8

6 16

7 19

10 28

13 37

20 58

Removing which ordered pair would make it possible for the function to be linear?

A (2, 4)

B (4, 8)

C (7, 19)

D (20, 58)

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47 Triangle ABC has coordinates A(22, 6), B(22, 4) and C(26, 4). Which coordinate grid shows DABC reflected over the y-axis?

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 100

10

9

8

7

6

5

4

3

2

1

y

x

B’

A’

C’

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 100

10

9

8

7

6

5

4

3

2

1

y

x

B’

A’

C’

A C

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 100

10

9

8

7

6

5

4

3

2

1

y

x

B’

A’

C’

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 100

10

9

8

7

6

5

4

3

2

1

y

x

B’

A’

C’

B D

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48 Use the graph below.

x

y

10

1

2

3

4

5

6

7

8

9

10

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-1-2-3-4-5-6-7-8-9-10 2 3 4 5 6 7 8 9 10

Line ALine B

How many solutions does the system of equations represented by the lines have?

A no solution

B one solution

C two solutions

D infinitely many solutions

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49 Hideki rode his bicycle to a friend’s house and then waited for his friend to get his bicycle. Then they rode together back to Hideki’s house. Hideki drew this graph to represent the situation.

Time

Dis

tan

ce f

rom

Ho

me

x

y

A B C ED

If Hideki always rode his bicycle at a constant rate, which describes his error in making the graph?

A The slope of the graph between A and B should be less than the slope between C and D.

B The graph between A and B should be a straight line instead of curved.

C The graph between B and C should not be flat.

D The amount of time between A and B should be the same as between C and D.

50 Where do the graphs of the linear equations 2x 1 3y 5 4 and 5x 1 6y 5 7 intersect?

A (21, 2)

B (4, 7)

C The lines do not intersect.

D The lines are the same line, so they intersect at every point on the line.

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51 A two-mile taxi ride costs $3.90. A five-mile ride in the same taxi costs $7.50. If x represents the miles driven and y represents the cost in dollars, which linear equation models the cost of a taxi ride?

A y 5 1.5 1 1.2x

B y 5 21.25 1 1.2x

C y 5 3.6 1 3x

D y 5 1.2 1 1.5x

52 Is the equation y 5 x2 1 3 a function?

A No, because when x 5 0, y ? 0.

B No, because when x 5 1 or x 5 21, y 5 4.

C Yes, because there are no x-values where y is undefined.

D Yes, because for every x-value there is only one y-value.

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53 Which sequence of transformations on Figure A will result in the congruent image, Figure A’, as shown on the coordinate plane below?

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 100

10

9

8

7

6

5

4

3

2

1

y

x

B’C’

A’

A B

C

Figure A

Figure A’

A Reflect Figure A over the y-axis, then rotate 90° counterclockwise about the origin.

B Reflect Figure A over the line y 5 x, then rotate 908 counterclockwise about the origin.

C Reflect Figure A over the line y 5 x, then rotate 908 clockwise about the origin.

D Reflect Figure A over the y-axis, then rotate 90° clockwise about the origin.

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54 Every summer, the Fish and Game Department stocks a local lake with fish. The scatter plot below shows the number of fish in the lake over 10 weeks during the summer.

Nu

mb

er o

f Fi

sh (

in t

ho

usa

nd

s)

Week

6.6

8.8

11.0

4.4

2.2

0 1 2 3 4 5 6 7 8 9 10

POPULATION OF FISHIN A LAKE

How could the association between the week and number of fish in the lake be described?

A There is a negative association.

B There is a positive association.

C There is no association.

D There is a nonlinear association.

55 Bryce is deciding whether a graph is a function. What feature of the graph assures that the graph is a function?

A The graph has a vertical line of symmetry.

B The graph has a horizontal line of symmetry.

C Every possible horizontal line that can be drawn will intersect the graph at only one point.

D Every possible vertical line that can be drawn will intersect the graph at only one point.

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56 If Hector dilates Figure A with the center of dilation at (0, 0) and a scale factor of 2, and then translates the figure 1 unit to the left, what will be the coordinates of the vertices of the similar figure that results?

-1

-2

-3

-4

-5

-6

-6 -5 -4 -3 -2 -1 1 2 3 4 5 60

6

5

4

3

2

1

y

xFigure A

A (27, 24), (27, 4), (5, 4), and (5, 24)

B (26, 26), (26, 2), (6, 2), and (6, 26)

C (26, 25), (26, 3), (6, 3), and (6, 25)

D (28, 24), (28, 4), (4, 4), and (4, 24)

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57 Which scatter plot has an outlier?

x

y

x

y

A C

x

y

x

y

B D

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58 Figure A and its image after a transformation, Figure A’, are shown on the coordinate plane below.

-1

-2

-3

-4

-5

-6

-6 -5 -4 -3 -2 -1 1 2 3 4 5 60

6

5

4

3

2

1

y

x

FigureA

FigureA’

Which transformation to Figure A demonstrates the congruence between the two figures?

A a translation 8 units down

B a reflection over the x-axis

C a reflection over the y-axis

D a rotation of 180° about the origin

59 Which statement correctly describes y 5 3x 1 5?

A It is not a function.

B Its graph is not a straight line.

C It is a nonlinear function.

D It is a linear function.

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60 Ingrid types faster than 50 words per minute. Which graph could represent the number of words Ingrid can type over time?

500

450

400

350

300

250

200

150

100

50

1 2 3 4 5 6 7 8 9 100

y

x

(3, 120)

(5, 200)

(10, 400)

Minutes

Wo

rds

Typ

ed

500

450

400

350

300

250

200

150

100

50

1 2 3 4 5 6 7 8 9 100

y

x

(2, 100)

(5, 250)

(8, 400)

MinutesW

ord

s Ty

ped

A C

500

450

400

350

300

250

200

150

100

50

1 2 3 4 5 6 7 8 9 100

y

x

(2, 50)

(6, 150)(8, 200)

Minutes

Wo

rds

Typ

ed

500

450

400

350

300

250

200

150

100

50

1 2 3 4 5 6 7 8 9 100

y

x

(1, 100)

(2, 200)

(4, 400)

Minutes

Wo

rds

Typ

ed

B D

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61 Triangle PQR is shown below.

-1

-2

-3

-4

-5

-5 -4 -3 -2 -1 1 2 3 4 50

5

4

3

2

1

y

xR

P

Q

Suppose triangle PQR were rotated 1808 counterclockwise about the origin to produce triangle P’Q’R’. Which set of coordinates would represent triangle P’Q’R’?

A P’(22, 21), Q’(23, 1), R’(21, 0)

B P’(21, 2), Q’(1, 3), R’(0, 1)

C P’(1, 22), Q’(21, 23), R’(0, 21)

D P’(2, 1), Q’(3, 21), R’(1, 0)

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62 Nina wants to derive the equation of line ··· BE in the graph shown below. She started by defining the length of ··· CD to be 1, the length of ··· DE to be 3, and the length of ··· AB to be x.

x

y

10

2

3

5

6

-1

-2

-3

-4

-5

-6

-1-2-3-4-5-6 2 3 5 6

1

4

4A

BC

DE

What should she define the length of ··· AC to be so that she can set up a proportion and derive the equation?

A y 2 2

B y 2 1

C y 1 1

D y 1 2

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63 Which scatter plot shows a nonlinear association between the variables?

Pop

ula

tio

n (

in t

ho

usa

nd

s)

Years

6.6

8.8

11.0

4.4

2.2

0 1 2 3 4 5 6 7 8 9 10

POPULATION OF ACITY

Pop

ula

tio

n

Minutes

60

80

100

40

20

50

70

90

30

10

0 1 2 3 4 5 6 7 8 9 10

POPULATION OFBACTERIA

A C

Pop

ula

tio

n

Hours

147

196

245

98

49

0 1 2 3 4 5

POPULATION OF VIRUS

Pop

ula

tio

n (

in t

ho

usa

nd

s)

Year Since 2000

6.6

8.8

11.0

4.4

2.2

0 1 2 3 4 5 6 7 8 9 10

POPULATION OFENDANGERED ANIMALS

B D

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64 Which set of ordered pairs models a function?

A {(28, 0), (28, 1), (26, 4), (25, 22), (23, 6)}

B {(3, 28), (3, 27), (3, 26), (3, 25), (3, 23)}

C {(28, 8), (27, 8), (26, 8), (25, 8), (23, 6)}

D {(28, 0), (27, 1), (25, 23), (25, 3), (0, 8)}

65 Mrs. Peterson asked her students to use a number line to show the approximate value of Ï··· 21 . The table below shows the number lines of four students.

Name Number Line

Jasmine4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0

W

Felipe4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0

X

Daniel4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0

Y

Susan4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0

Z

Whose answer is closest to the correct answer?

A Jasmine

B Felipe

C Daniel

D Susan

STOP

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Cut along the dotted line.

Assessment 1 (continued)

Ready® North Carolina—Mathematics Assessments, Grade 8 Answer Form

Name

Teacher Grade

School City

North Carolina Assessment 1 and 2

Assessment 2

1. A B C D

2. A B C D

3. A B C D

4. A B C D

5. A B C D

6. A B C D

7. A B C D

8. A B C D

9. A B C D

10. A B C D

11. A B C D

12. A B C D

13. A B C D

14.

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

15. A B C D

16. A B C D

17. A B C D

18. A B C D

19. A B C D

20.

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

21. A B C D

22. A B C D

23. A B C D

24. A B C D

25. A B C D

26. A B C D

27. A B C D

28.

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

29. A B C D

30. A B C D

31. A B C D

32. A B C D

33. A B C D

34.

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

35. A B C D

36. A B C D

37. A B C D

38. A B C D

39. A B C D

40. A B C D

41. A B C D

42. A B C D

43. A B C D

44. A B C D

45. A B C D

46. A B C D

47. A B C D

48. A B C D

62. A B C D

63. A B C D

64. A B C D

65. A B C D

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©Curriculum Associates, LLC Copying is not permitted.121

Cut

alo

ng th

e do

tted

line

.

Ready® North Carolina—Mathematics Assessments, Grade 8 Answer Form

Name

Teacher Grade

School City

North Carolina Assessment 2 and 3

Assessment 2 (continued)

Assessment 3

49. A B C D

50. A B C D

51. A B C D

52. A B C D

53. A B C D

54. A B C D

55. A B C D

56. A B C D

57. A B C D

58. A B C D

59. A B C D

60. A B C D

61. A B C D

62. A B C D

63. A B C D

64. A B C D

65. A B C D

1. A B C D

2. A B C D

3. A B C D

4. A B C D

5. A B C D

6. A B C D

7. A B C D

8. A B C D

9. A B C D

10. A B C D

11. A B C D

12.

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

13. A B C D

14. A B C D

15. A B C D

16. A B C D

17. A B C D

18. A B C D

19.

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

20. A B C D

21. A B C D

22. A B C D

23.

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

24. A B C D

25. A B C D

26. A B C D

27. A B C D

28. A B C D

29. A B C D

30. A B C D

31.

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

7

8

9

6

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

0

1

2

3

4

5

6

7

8

9

32. A B C D

33. A B C D

34. A B C D

35. A B C D

36. A B C D

37. A B C D

38. A B C D

39. A B C D