This table shows a linear relationship between the amount of water in a tank and time. Which of these statements is true?
A. The water in the tank is increasing at a rate of 10 gallons per minute.
B. The water in the tank is decreasing at a rate of 5 gallons per minute
C. The water in the tank is decreasing at a rate of 10 gallons per minute.
D. The water in the tank is increasing at a rate of 5 gallons per minute.