The following 6 months of data were collected on electricity cost and the number of machine hours in a factory.

	Electricity	Machine
Month	cost	hours
June	$25,160	4,500
July	26,170	4,810
August	27,250	5,120
September	26,680	5,010
October	27,950	5,430
November	27,500	5,190

Refer to Figure 3-13. A dependent variable value used in calculating the cost line using the high-low method is:

	a.	5,430
	b.	$27,900
	c.	4,500
	d.	$25,160