The controller of Furgee Industries has collected the following monthly expense data for use in analyzing the cost behaviour of maintenance costs.

Month		Total Maintenance Costs			Total Machine Hours
January		$2,500			300
February		3,000			350
March		3,600			500
April		4,500			690
May		3,200			400
June		4,900			700

which graph is correct that shows the behaviour of maintenance costs.

A)

B)

C)

D)