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?
Responses
A 0.14
B 7.25
C 12.5
D 65
To find the constant of proportionality, we need to find the ratio of the amounts paid to the number of hours worked.
For the first scenario, the ratio is $87 / 12 = $7.25 per hour.
For the second scenario, the ratio is $65.25 / 9 = $7.25 per hour.
Since the ratios are the same in both scenarios, the constant of proportionality that describes this relationship is $7.25.
Therefore, the correct answer is B) 7.25.