In the function
-
A reasonable unit for the variable
is minutes. This variable represents the time elapsed since the filling started. -
A reasonable unit for the variable
is gallons. This variable represents the total amount of water that has been added to the pool after minutes. -
The range represents the total gallons of water in the pool as it fills over time. Since the filling starts at 0 gallons and continues until the pool reaches its capacity, the range can be thought of as all possible amounts of water in gallons that can be filled within the constraints of the pool's total capacity. If the pool has a maximum capacity
, then the range would be from to gallons.