Pedro's family cat has an automatic food dispensing machine that holds 14 cups of food. Each day the cat gets fed 0.6 cups of food. A warning light comes on when the
remaining food is 1.5 cups or less.
Pedro says the expression 14 -0.6x helps him understand this situation. In this
situation, what does this expression represent, and what does the variable z stand for?
Start your explanation with "This expression represents..." and end it with "The variable
stands for..."