Algebra-1

To determine the unit rate or constant of proportionality, we need to find the ratio of the change in the dependent variable (money) to the change in the independent variable (hours).

Let's calculate the ratios for the given data:

For the change from 0 hours to 1 hour:
Change in money = $9 - $0 = $9
Change in hours = 1 - 0 = 1
Ratio = $9 / 1 = $9

For the change from 0 hours to 2 hours:
Change in money = $18 - $0 = $18
Change in hours ...