V8 Car Engine Is Coupled to a Dynamometer and the Horsepower

V8 car engine is coupled to a dynamometer and the horsepower y is measured at different engine speeds $x$ (in thousands of revolutions per minute) . The results are shown in the table below. Use a graphing utility to plot the data and graph the cubic model.
$\begin{array}{|c|c|c|c|c|c|c|}\hline x & 1 & 2 & 3 & 4 & 5 & 6 \\\hline y & 110 & 155 & 210 & 270 & 295 & 315 \\\hline\end{array}$

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