Answer:
Correct option: D -> 14 minutes
Step-by-step explanation:
The meaning of the constant of variation for a inversely proportion is that the product of one variable by the other one will always be that constant value. That is, if we multiply the time t in minutes by the rate r in gallons per minute, we must find 56 as the result.
So if we want to find the time when the rate is 4 gal/min, we have:
t * r = 56
t * 4 = 56
t = 56 / 4 = 14 minutes
Correct option: D.
