The Sparkling Pool Company supplies the graph below to each of its new clients. The graph shows the relationship between the amount of water pumped into a pool and the time that has elapsed.
Which of the following statements best describe the rate at which the water is pumped into a pool.
A)The water is pumped at a rate of approximately 15 gallons per hour.
B)The water is pumped at a rate of approximately 500 gallons per hour
C)The water is pumped at a rate of approximately 15 gallons per minute.
D)The water is pumped at a rate of approximately 909 gallons per minute.