Toronto Company Makes Cell Phones $\begin{array}{ll}\text { Intercept } & 2,225 \\\text { X Variable 1 } & 9.75\end{array}$

Multiple Choice

Toronto Company makes cell phones. The company controller wanted to calculate the fixed and variable costs associated with electricity use in the factory. Data for the past four months were collected.Coefficients shown by a regression program are:
$\begin{array}{lrr}& \text { Electricity } & \text { Machine } \\\text { Month } & \text { cost } & \text { hours }\\\text { May } & \$ 7,560 & 570 \\\text { June } & 8,220 & 625 \\\text { July } & 7,480 & 546 \\\text { August } & 7,186 & 518\end{array}$ $\begin{array}{ll}\text { Intercept } & 2,225 \\\text { X Variable 1 } & 9.75\end{array}$
-Refer to the Figure.What is the variable rate of the electricity cost when using the results of regression?

A) $9.67 per machine hour
B) $9.75 per machine hour
C) $10.25 per machine hour
D) $13.87 per machine hour