The value of Jeremy's car is decreased by a constant amount each year after purchase. The equation describes the relationship between x, the number of years since the car was purchased, and y, the value in dollars of the car. y=18,000−1,500x What is the meaning of the rate of change for the equation? A. It means there is a $18,000 decrease in value every year. B. It means the car was purchased for $1,500. C. It means there is a $1,500 decrease in value every year. D. It means the car was purchased for $18,000.