A movie theater charges $10.00 for an adult ticket to an evening showing of a popularmovie. To help the local animal shelter, the theater management has agreed to reducethe price of each adult ticket by $0.50 for every can of pet food a customer contributesto a collection barrel in the theater lobby. Which of the following shows both anequation in which y represents the cost of an adult ticket in dollars for a customer whocontributes 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?