The Following Data List Ages of Cars (In Years) and Monthly

Multiple Choice

The following data list ages of cars (in years) and monthly repair cost (in dollars) . What is the standard error of estimate ?
$\begin{array}{ll}\text { Age } & \text { Cost } \\3 & 25 \\5 & 35 \\7 & 55 \\9 & 50 \\11 & 75 \\14 & 85\end{array}$

A) 6.36
B) 7.34
C) 8.75
D) 5.49