Resale Value of a Refrigerator. Amount in dollars. Years after original purchase. The rate of change is constant in the graph. Find the rate of change. Explain what the rate of change means for the situation. A. –1; value drops $1 every year. B. –3; value drops $3 every year. C. –100; value drops $100 every year. D. negative 100 divided by 3; value drops 100 dollars every 3 years.