A V8 car engine is coupled to a dynamometer, and the horsepower y is measured at different
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A 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.
(a) Use the regression capabilities of a graphing utility to find a cubic model for the data.
(b) Use a graphing utility to plot the data and graph the model.
(c) Use the model to approximate the horsepower when the engine is running at 4500 revolutions per minute.
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