Question

At 1:00 pm the water level in a pool is 13 inches. At 1:30pm the water level is 18 inches. At 2:30pm the water level is 28 inches. What is the constant rate of change?

Answer 1

The constant rate of change is +5 inches per half hour. Divide 5 by 30 of you want to find the rate of change per minute.