Hook Company Wants to Develop a Cost Estimating Equation for Its

Multiple Choice

Hook Company wants to develop a cost estimating equation for its monthly cost of electricity.It has the following data: $\begin{array}{lcc}\text { Month } & \text { Cost of Electricity } & \text { Direct Labour Hours } \\\hline\text { January } & \$ 8,100 & 750 \\\text{April} & 9,000 & 850 \\\text { July } & 10,200 & 1,000 \\\text { October } & 8,700 & 800\end{array}$ Using the high-low method,which of the following is the best equation?

A) Y = $900 + $8.40X
B) Y = $900 + $12.00X
C) Y = $1,800 + $8.40X
D) Y = $2,400 + $8.40X