As with Many Other Construction Materials, the Price of Gravel

Multiple Choice

As with many other construction materials, the price of gravel (per ton) depends on the quantity of material ordered. The following table presents the unit cost (dollars/ton) for gravel for various order sizes (in
Tons) .
$\begin{array} { c c } \hline \text { Tons of Gravel } & \text { Unit Cost (dollars/ton) } \\\hline 73 & 16.49 \\22 & 21.14 \\89 & 15.98 \\86 & 16.24 \\60 & 17.34 \\95 & 16.13 \\56 & 16.71 \\31 & 20.02 \\90 & 17.05 \\23 & 21.76 \\\hline\end{array}$
Compute the coefficient of determination.

A) -0.0767
B) -0.9233
C) 0.8525
D) 0.1475