Jorgenson Corporation has provided the following data for the first five months of the year: Machine HoursLubrication CostJanuary240$1,500February320$1,600March400$1,740April300$1,580May340$1,680Using the least-squares regression method of analysis, the estimated variable lubrication cost per machine hour is closest to:
A. $1.40
B. $1.28
C. $0.80
D. $1.56
Answer: D
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