Thursday, March 22 nd

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