Thursday, March 22 nd
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Transcript of Thursday, March 22 nd
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Thursday, March 22nd Please have Graphing
worksheet out!
Warm Up
1. Explain how you graph the point (3, -4)
2. What is k in the equation y=7x
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Corny of Joke of the Day
What did the big flower say
to the little flower?
“how are you, Bud?”
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MARCH MADNESS
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March Madness Grade 6
March MadnessMath CRCT: Grade 6Wednesday, March 21
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March Madness Grade 6
5. Which of these figures has the most lines of symmetry?
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March Madness Grade 6
6. On a certain map, .5 inch represents 75 miles. If the distance between two towns on this map is 2.25 inches, what is the actual distance between
the two towns?
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March Madness Grade 6
March MadnessMath CRCT: Grade 6Thursday, March 22
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March Madness Grade 6
7. Which method could be used to solve the number sentence shown?
4x = 16
A. Subtract 4 from 4x, and subtract 4 from 16B. Subtract 4 from 4x, and subtract 16 from 16
C. Divide 4x by 4, and divide 16 by 16D. Divide 4x by 4, and divide 16 by 4
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March Madness Grade 6
8. Which of the following nets can be folded along the dashed lines to form a cube?
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Homework Answers
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Where is the origin?!?!
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Do You Remember?Which axis is the horizontal axis? _____________Which axis is the vertical axis? _____________
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Label the Quadrants!
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How would you graph (-5, 7)
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Goal for TodayUnderstand how to graph y=kx
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DirectVariation
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Recap• A Linear equation makes a LINE
when graphed• Y= kx is a special kind of LINEAR
equation• Y=kx must go through (0,0)• In an equation we always put in a
number for k (y=2x) • K is our slope (how steep the line
is)
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Part I: Determining if a function is a Direct
Variation
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Which one is a direct variation?
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Which one is a direct variation?
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Direct variation equation• Equation can not have anything
added or subtracted to it.
• Remember that y=x/4 is the same as y = 1/4 x
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Which one is a direct variation?
1. Y= 3x+22. Y=3. Y= 0.85x4. Y= 5. Y= 443x
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Part II: Finding K in a Table
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Finding KK = y ÷ x
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Example #1
X 2 4 6Y 8 16 24
Answer: k=4
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Example #2
Answer: k=1/4
x y 8 212 320 528
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Example #3
Answer: k=5/2 or 2 ½
X 4 12 16Y 10 30 40
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EXCITING NEWS!!! Now that we know how to find k in a table, we can look at a table to see if
it’s truly a direct variation!!! Steps: • For each ordered pair, divide y by x
and make sure it’s the same number!
• If it’s not then it isn’t a direct variation
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Which table shows a Direct Variation?
X 4 12 16Y 3 9 12
X 5 10 15Y 1 3 4
X 1 2 3Y 2 4 8
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Part III: Practicing Graphing
y = kx