Answer: The constant term 12 represents the number of pizzas sold in an hour if 0 discount coupons are offered.
Explanation:
You didn't post the equation.
I'm going to assume that it's y=kx+12 where x is the number of coupons, and I don't know what k is.
Normally, 12 would be the y-intercept, or when x is zero, so the answer is probably "The constant term 12 represents the number of pizzas sold in an hour if 0 discount coupons are offered."