Post on 15-Jul-2015
Category # of Assignments Weight
Class Work 10 Graded 20%
Home Work 18 Topics 20%
Tests6;
(5 counted)40%
Notebook 1 10%
Final Exam 2 Parts .05% Each
Grades & Weighting: All Quarters
Mrs. Wright rents a car to see her friend Mrs. Wong. The cost is $32.00 plus $.75 a mile. The trip is 45 miles each way. What is the total cost for Wright to see Wong?
A. $32.75 B. $99.50 C. $75.00 D. $65.75 E. None
4 Most Missed Questions from Final Exam
#4; Version 1: 39% correct
#3; Version 1: 37% correct
Solve for p: A = (ap + pH)
A) p = a + H B) p = A C) p = A – a D) p = H - a E. NoneA a + H H A
4 Most Missed Questions from Final Exam
#2; Version 2: 36% correct
A. 125% B. 90% C. 55% D. 80% E. None
4 Most Missed Questions from Final Exam
#1; Version 4: 26% correct
A. −𝟑
𝟓B.
𝟏
𝟏𝟎C.
𝟏
𝟓D.
𝟏
𝟐𝟎E.
−𝟐
𝟓
What is the slope of the line 𝟒𝒚 + 𝟑 =𝟏
𝟓𝒙?
Parallel lines have the same slopes so find the slope of the given line and the slope you want for a parallel line will be the same.
Perpendicular lines have negative reciprocal slopes. take the slope of the given line, switch the numerator and denominator and change the sign for the slope of its perpendicular line.
Parallel & Perpendicular Lines:
EXAMPLE 2
Determine whether lines are parallel or perpendicular
Line a: y = 5x – 3
Line b: x + 5y = 2
Line c: –10y – 2x = 0
SOLUTION Find the slopes of the lines.
Write the equations for lines b and c in slope-intercept
form.
EXAMPLE 2
Line b: x + 5y = 2 5y = – x + 2
Line c: –10y – 2x = 0 –10y = 2x y = – x15
Determine whether lines are parallel or perpendicular
xy =25
15 +–
Line a: The equation is in slope-intercept form.The slope is 5.
Determine which lines, if any, are parallel or perpendicular.
Line a: 2x + 6y = –3 Line b: y = 3x – 8
Line c: –1.5y + 4.5x = 6
ANSWER
parallel: b and c; perpendicular: a and b, a and c
Final Question:
Class Work:
3-1 Front side is a review of
coordinate plane thus far
Back side is Parallel/Perpendicular