tyson has a $50 gift card to use at a store

Question

tyson has a $50 gift card to use at a store. He does not have any additional money to spend at the store. Tyson will purchase a belt that cost $8 and x number of shirts that cost $15 each. The function f(x)=42-15x models the balance on the gift card after tyson makes the purchases. What is the most appropriate domain of the function?

Answer 1

domain is the interval of x, which varies between 0 and 2.

He can't afford a 3rd shirt 42-(3)15 = -$3