Question

A pump removes 1500 gal of water from a pool at a constant rate of 40 gal/min. Which equation models the amount of water y in the pool after t minutes

y=40t-1500
y=40t+1500
y=-40t-1500
y=-40t+1500

Answer 1

the1500 gal must be positive cuz there is that amount of water in the pool
the 40 must be negative cuz the pump is removing the water at a constant rate od 40 gal/min

Answer 2

thanks you !!!