Question

The equation y = -1. 5x + 24 represents the gallons left ina tub after x minutes of being drained.Interpret the y-intercept. (What does the number (0,24) represent?)

Answer 1

The y-intercept represents the number of gallons present in the tank at time zero.

Explanation:

If the number of gallons as a function of time is given by

y = - 1.5 x + 24

with "x" representing the minutes elapsed, the y-intercept (0,24) represents the number of gallons in the tub when we started counting time (that is at time zero)