A pet store employee added water to a fish tank. The function W(t)=4+2t represents the amount of water, in gallons, that the tank contained after t minutes.

Question

Complete the sentence.
There were ___ gallons of water in the tank before the employee started filling it, and he added water at a rate of ___ gallons per minute.

Answer 1

There were 4 gallons of water in the tank before the employee started filling it, and he added water at a rate of 2 gallons per minute.