Final answer:
The rate of change, or the amount of rain created per hour, is 0.5 inches per hour.
Step-by-step explanation:
The rate of change represents how one quantity changes in relation to another quantity. In this case, we have the amount of rain (4 inches) and the time it takes for that amount of rain to fall (8 hours). To find the rate of change, we divide the change in the amount of rain by the change in time.
Rate of change = change in amount of rain / change in time
Rate of change = 4 inches / 8 hours = 0.5 inches per hour.