1. Bellringer

2. Bellringer
Write and equation for each graph

3. 5-5
Direct Variation

4. Direct Variation A function in the form ,where
, is a direct variation. The constant of variation, , is the coefficient of The variables and are said to vary directly with each other.

5. Is it direct variation? To discover this, just solve for y.
Find the constant of variation

6. Is it direct variation? Try these please.
Remember: To discover this, just solve for y.
yes no no

7. Write the equation from a point
Given point: (4, -3)

8. Write the equation from a point
Your turn!
Point (-3, -6)
Point (12, -8)

9. Direct Variation Tables
Use the ratio, , to tell whether y varies directly with x.
Why? Since, k =
If yes, then write the direct variation equation. x y -2 1 4 8 -4
-10 5

10. Assignment
Page 264
Numbers: even