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
A0.14
0.14
B7.25
7.25
C12.5
12.5
D65
To find the constant of proportionality, we need to divide the total amount paid by the total number of hours worked.
The total amount paid is $87 + $65.25 = $152.25.
The total number of hours worked is 12 + 9 = 21.
Thus, the constant of proportionality is $152.25 divided by 21, which equals $7.25.
Therefore, the correct answer is B) 7.25.