thursday, march 22 nd
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Thursday, March 22 nd. Warm Up. Please have Graphing worksheet out!. Explain how you graph the point (3, -4) 2. What is k in the equation y=7x. Corny of Joke of the Day. What did the big flower say to the little flower? “how are you, Bud?”. March Madness. March Madness - PowerPoint PPT PresentationTRANSCRIPT
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
Corny of Joke of the Day
What did the big flower say
to the little flower?
“how are you, Bud?”
MARCH MADNESS
March Madness Grade 6
March MadnessMath CRCT: Grade 6Wednesday, March 21
March Madness Grade 6
5. Which of these figures has the most lines of symmetry?
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?
March Madness Grade 6
March MadnessMath CRCT: Grade 6Thursday, March 22
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
March Madness Grade 6
8. Which of the following nets can be folded along the dashed lines to form a cube?
Homework Answers
Where is the origin?!?!
Do You Remember?Which axis is the horizontal axis? _____________Which axis is the vertical axis? _____________
Label the Quadrants!
How would you graph (-5, 7)
Goal for TodayUnderstand how to graph y=kx
DirectVariation
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)
Part I: Determining if a function is a Direct
Variation
Which one is a direct variation?
Which one is a direct variation?
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
Which one is a direct variation?
1. Y= 3x+22. Y=3. Y= 0.85x4. Y= 5. Y= 443x
Part II: Finding K in a Table
Finding KK = y ÷ x
Example #1
X 2 4 6Y 8 16 24
Answer: k=4
Example #2
Answer: k=1/4
x y 8 212 320 528
Example #3
Answer: k=5/2 or 2 ½
X 4 12 16Y 10 30 40
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
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
Part III: Practicing Graphing
y = kx