Unit Rates

1. Using the equation below, evaluate when x = 10

Y = 3x

• 20

• 30

• 13

• 7

Answer explanation

If x = 10, then you have to replace x with 10, so 10 x 3 = 30.

2. Using the equation below, evaluate when x = 13

Y = 4x

• 13 = 4x

• y = 13 (4)

• y = 13+4

• y = 13 - 4

 3. Using the equation below, evaluate when x = 21

Y = 7x

• Y = 147

• Y = 13

• Y = 3

• Y = 28

4. Using the equation below, evaluate when x = 22

Y = 13x

(a)  

• 5
• X = 5
• 99/20
• 80
• 1,200

8. Using the equation below, evaluate when x = 21

Y = 0.72x

• Y = 15.12

• Y = 21.72

• X = 20.28 

• Y =  29.16

• Y = 52

• Y = 6

• X = 192

• Y = 44

10. Using the equation below, evaluate when x = 33

Y = 0.89x

Y = ​ ​ (a)  

• 29.37
• 32.11
• 33.89
• 42.9