Final answer:
The relationship between total cost and hours for the tractor rental is not proportional due to the different initial fee and consistent additional hourly rate.
Step-by-step explanation:
The relationship between the total cost and the hours in the given scenario is not proportional. This is because the initial cost for the first hour is a flat fee, and each additional hour adds a consistent amount to the total cost, which does not fit the definition of a proportional relationship. Proportionality would require that the total cost to the hours rented be consistent across the board.
For example, if a proportional relationship existed, renting the tractor for one hour or many hours would have a consistent unit rate, which isn't the case here. This scenario mirrors similar situations, such as the scuba equipment rental example provided, where an up-front fee is followed by a consistent hourly charge, forming a linear equation that does not exhibit proportionality.