A tank holds 500 gallons of water. The water is drained from the tank at a constant rate of 25 gallons per minute. The amount of water (in gallons) remaining in the tank after minutes is given by the equation . If this equation is graphed with on the horizontal axis and on the vertical axis, what does the -intercept of the graph represent?
The initial amount of water in the tank.
The rate at which water is drained from the tank.
The time it takes for the tank to be completely empty.
The amount of water remaining after 1 minute.
