Use the Following Information for Questions -Using the High-Low Method, What Is the Slope for This

Multiple Choice

Use the following information for questions
$\begin{array}{c}\begin{array}{l}\\\underline{\text { Month }} \\\text { Jan } \\\text { Feb } \\\text { Mar } \\\text { Apr } \\\text { May } \\\text { Jun } \\\text { Jul } \\\text { Aug }\end{array}\begin{array}{ll}\text { \# Machine } & \text { Maintenance } \\ \underline{\text { Hours (X) }} & \underline{ \text { Costs(Y) }}\\3,000 & \$ 440 \\4,500 & \$ 690 \\8,000 & \$ 510 \\ 7,000 & \$ 600 \\6,000 & \$ 550 \\9,000 & \$ 980 \\3,500 & \$ 840 \\5,500 & \$ 600 \end{array}\end{array}$


-Using the high-low method, what is the slope for this set of data?

A) $9
B) $0.09
C) $11.11
D) $540