Answer:
y = 40t
Explanation:
A pump removes 500 gallons of water at a constant rate of 40 gallon/min.
∵ In one minute amount of water removed is 40 gallons.
∴ In t minutes amount of water will be removed = 40t
So equation will be y = 40t
y = 40t is the equation which models the amount of water y in the pool after t minutes.