A tank initially contains 300 gallons of water. Water is drained from the tank at a constant rate of 15 gallons per minute. The amount of water, , in gallons, remaining in the tank after minutes is given by the function . Which of the following is the best interpretation of the -intercept of the graph of ?
The tank is drained completely in 20 minutes.
The rate at which water is drained from the tank is 15 gallons per minute.
The amount of water in the tank after 1 minute is 285 gallons.
The initial amount of water in the tank was 300 gallons.
