Final answer:
The situation described is Non-Proportional because the total labor cost for a repair does not directly vary with the number of hours of work.
Step-by-step explanation:
The situation described is Non-Proportional because the total labor cost for a repair does not directly vary with the number of hours of work. In this case, the labor cost is $37.50 per hour, and there is a $25 coupon applied to the total cost. The coupon does not change based on the number of hours of work, so it does not affect the proportionality of the situation. Therefore, the relationship between the total labor cost (y) and the number of hours of work (x) is non-proportional.