Question

Sara makes $255 for working 15 hours and makes $680 for working 40 hours. What is the constant of proportionality (unit rate) of Sara's rate of pay per hour?

A. 15
B. 2.6 repeating
C. 17
D. 12

Answer 1

C.17

Explanation:

255/15 = 17

680/40 = 17

15*17 = 255

40*17 = 680