The owner of a candle store purchases his candies from a local distributor. The graph below shows the relationship between n, the number of candles ordered, and
C, the total cost of the candle order. What is the relationship between the total cost of the candle order, c, and the number of candles ordered,
A. c=2n
B. c=4n
C. c=1/4n
D. c=1/2n