4. Suppose soda is on sale for $0.50 a can, and you have a coupon for $0.80 off your total
purchase. Write a function rule for the cost of n cans of soda.
(1 point)
C(n) = 0.80n – 0.50
C(n) = 0.50n – 0.80
C(n) = (0.50 + n) – 0.80
C(n) = (0.80 + n) – 0.50
C(n) = 0.50n – 0.80
The correct function rule for the cost of n cans of soda would be:
C(n) = 0.50n - 0.80