The equation represents the volume , in gallons, of water remaining in a swimming pool minutes after a pump begins draining it. If the equation is graphed in the -plane, which of the following is the best interpretation of the -coordinate of the line's -intercept in the context of the problem?
The initial volume of water in the pool, in gallons
The rate at which water is drained from the pool, in gallons per minute
The total amount of water drained from the pool, in gallons
The number of minutes it takes for the pool to be completely empty
