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

Answer: 15

Step-by-step explanation:

As defined in the lesson on Unit Rate and Proportionality, the unit rate is the rate of change in a relationship where the rate is per 1. The rate of change is the ratio between the x and y values in a table. Another term for the rate of change for proportional relationships is the constant of proportionality.

Answer 2

Answer:

C.17

Step-by-step explanation:

255/15 = 17

680/40 = 17

15*17 = 255

40*17 = 680