Nira was paid $100 for 8 hours of babysitting and $112.50 for 9 hours. What is the constant of proportionality that describes this relationship?

Question

A. 0.08

B. 65

C.12.50

D. 125

Answer 1

We can start by setting up a proportion:

$100/8 = x/9$

We can solve for $x$:

$8x = 900$

$x = 112.50$

Therefore, the constant of proportionality is $112.50/9 = 12.50$.

The answer is C.