A plumber is draining a tub, The graph shows the water level of the tub in gallons after draining for x hours.
What is the range of the function for this situation.

A) all real number is greater than or equal to 0 and less than or equal to 15.

B) all real numbers less than or equal to 15.

C) all real numbers greater than or equal to 0 and less than or equal to 20.

D) all real numbers less than or equal to 20.

A plumber is draining a tub The graph shows the water level of the tub in gallons after draining for x hours What is the range of the function for this situati class=