Each week at her job at the pet store, Maddison must empty
the 180-gallon aquarium. With the hose she uses to drain the
water, 25 gallons are emptied per hour. Write an equation to
represent this situation. Then, calculate how many gallons
would be left in the aquarium after 4.5 hours.
y = -25x + 180
y = 180x – 25
y = 25x – 180