A movie theater charges $10.00 for an adult ticket to an evening showing of a popular movie. To help the local animal shelter, the
theater management has agreed to reduce the price of each
adult ticket by $0.50 for every can of pet food a customer
contributes to a collection
barrel in the theater lobby. Which of
the following shows both an equation in which y represents the
cost of an adult ticket in dollars for a customer who contributes x
cans of pet food, and the graph of the cost if a customer brings
in 2, 5, 8, or 10 cans of pet food?