Stratton, Inc., has collected the following information on its cost of electricity:

		Machine Hours		Total Electricity Costs
January		510		$240
February		540		$300
March		360		$205
April		450		$215
May		660		$290
June		690		$300
July		340		$180
August		520		$260
September		240		$120
October		750		$340
November		840		$360
December		600		$320

(a) & (b)

Assuming the line intersects the y-axis at $50 and using the August activity levels, calculate the equation of the line that would be drawn for a scattergraph. (Round variable cost to 3 decimal places, e.g. 15.251 and fixed cost to 0 decimal places, e.g 15.)