1. Solve and Graph: 2𝑥+4 ≤14 −3𝑥 >15 2𝑥+2 =20 5𝑥 =−25
Wildcat Drills
Solve and Graph:
2𝑥+4 ≤14
−3𝑥 >15
2𝑥+2 =20
5𝑥 =−25

2. 2.1Relations and Functions 2.2 Direct Variation
Learning Target:
I can graph relations.
I can identify functions.
I can write and interpret direct variation equations.

8. Get Ready: Solve each equation for y. 1. 12y = 3x 2. -10y = 5x

9. Example 1: Determine whether y varies directly with x.

11. Example 2: Determine whether y varies directly with x
Example 2: Determine whether y varies directly with x. If so, find the constant of variation.
Rule: If the equation is written as y=kx, then it does vary directly with x. Ex. 𝑦=3𝑥 If the equation is written as y=kx+c, then it does not vary directly with x. Ex. 𝑦=2𝑥+4

12. Problems: 𝑦=8𝑥 𝑦= 1 2 𝑥 𝑦=3𝑥+5 𝑦=4𝑥−1
*Remember these are yes or no answers.

13. Example 3: Find the missing value.
1. If y = 9 when x = -15, what is y when x = 21?
2. If y = 15 when x = 3, what is x when y = 60?

14. You do: Determine whether y varies directly with x. 𝑦=8𝑥 𝑦=−2𝑥+4
Find the missing value.
3. If y = -21 when x = 3, what is x when y = -14?

17. Assignment:
2.1 Page # 10, 13, 14, 18, 20, 24, 26, 30
2.2 Page # 8, 10, 14, 17, 25, 31, 36, 40, 44