The cost y (in dollars) to rent a moving van is proportional to the number x of days that the van is rented. It costs $140 to rent a van for 4 days. Write an equation that represents the cost to rent a moving van for x days.
Divide $140 by 4 to get the cost to rent the car for one day. Since y is the cost in dollars, 35 times x many days will give you the cost to rent the car.
