A group of college students are going to a lake house for the weekend and plan on renting small cars and large cars to make the trip. Each small car can hold 4 people and each large car can hold 6 people. The students rented 2 more large cars than small cars, which altogether can hold 72 people. Graphically solve a system of equations in order to determine the number of small cars rented, x, and the number of large cars rented, y.