Play Time is a nursery school for pre-kindergarten children. The school has determined that the following biweekly revenues and costs occur at different levels of enrollment:

Number of Students Enrolled		Total Revenue				Total Costs
13		$	2,600			$	1,800
18			3,600				2,300
19			3,800				2,470
23			4,600				3,270
24			4,800				3,360

The average cost per student when 19 students enroll in the school is:

Multiple Choice

• $170.

• $128.

• $130.

• $200.

• $800.