Which situation can NOT be represented by the equation y = 5x
 A. Joel has y dollars. This amount is 5 times x, the amount of money his sister has
 B. Joel has been playing baseball for x years. This is 5 times y, the number of years his brother has been playing baseball.
 C. The value of y is five times the value of x
 D. A company uses a total of y gallons of water at a rate of 5 gallons per hour for x hours