Mr. Chandler is organizing a field trip and is trying to figure out which vehicles to rent. He will need to transport at least 72 people, since that is the number of people going on the trip. A van can seat 7 people and a bus can seat 18 people.

Select the inequality in standard form that describes this situation. Use the given numbers and the following variables.
x = the number of vans rented
y = the number of buses rented