Answer:
Step-by-step explanation:
We aren't told what the 1, 2, 3, 4 represent. If it is number of children, then the question makes no sense. We have to assume it is probably hours.
dollars/hours = 15/1 = 30/2 = 45/3 = 60/4 = $15/h
The rate is a constant, so amount is proportional to hours.