Use a Graphing Calculator to Plot the Data and Find

Multiple Choice

Use a graphing calculator to plot the data and find the quadratic function of best fit.
-A small manufacturing firm collected the following data on advertising expenditures (in thousands of dollars) and total revenue (in thousands of dollars) . $$\begin{array} { c | c } \text { Advertising, } \mathrm { x } & \text { Total Revenue, } \mathrm { R } \\\hline 25 & 6430 \\28 & 6432 \\31 & 6434 \\32 & 6434 \\34 & 6434 \\39 & 6431 \\40 & 6432 \\45 & 6420\end{array}$$ Find the quadratic function of best fit.

A) R(x) = -0.31x² + 2.63x + 6128
B) R(x) = -0.024x² + 7.13x + 6209
C) R(x) = -0.091x² + 5.95x + 6337
D) R(x) = -0.015x² + 4.53x + 6123