The controller of Hall Industries has collected the following monthly cost data for use in analyzing the behavior of maintenance costs.

Month		Total Maintenance Costs		Total Machine Hours
January		$2,640			3,500
February		3,000			4,000
March		3,600			6,000
April		4,500			7,900
May		3,200			5,000
June		4,620			8,000

(b) Make a graph showing the behavior of maintenance costs and identify the fixed-cost and variable-cost components. Use 2,000-hour increments and $1,000 cost increments.