Suppose noodle soup is on sale for $0.75 a can, and you have a coupon for $0.50 off your total purchase. Write a function rule for the cost of n cans of soup.

Answer 1

The function rule for the cost of n cans of soup, considering the sale price and the coupon discount, can be given as:

Cost(n) = (0.75 * n) - 0.50

Where:
- Cost(n) represents the total cost of n cans of soup,
- 0.75 is the sale price per can, and
- 0.50 is the discount obtained by using the coupon.