Which is true about the functional relationship shown in the graph? Cost of Apples 110 100 90 60 70 180 Cost ($) 50 40 30 20 10 0 1 2 3 4 5 Weight (pounds) O A. The cost of the apples is a function of the type of apples. B. The weight of the apples is a function of their cost. O C. The cost of the apples is a function of their weight. O D. The weight of the apples is a function of the number of apples. a