Question

Savannah was paid $87 for 12 hours of babysitting and $65.25 for 9 hours. What is the constant of proportionality that describes this relationship?

A) 0.14
B) 7.25
C) 12.5
D) 65

Answer 1

y = kx
87 = k(12)
divide by 12 on both sides
k = 7.25

y = kx
65.25 = k(9)
divide by 9 on both sides
k = 7.25

Letter B

Answer 2

The answer is B. 7.25