Solved: Data Analysis: Sales The sales (in billions of
Chapter , Problem 3.1.86(choose chapter or problem)
Data Analysis: Sales The sales (in billions of dollars) for Harley-Davidson from 2000 through 2010 are shown in the table. (Source: U.S. Harley-Davidson, Inc.) (a) Use a graphing utility to create a scatter plot of the data. Let represent the year, with corresponding to 2000. (b) Use the regression feature of the graphing utility to find a quadratic model for the data. (c) Use the graphing utility to graph the model in the same viewing window as the scatter plot. How well does the model fit the data? (d) Use the trace feature of the graphing utility to approximate the year in which the sales for Harley-Davidson were the greatest. (e) Verify your answer to part (d) algebraically. (f) Use the model to predict the sales for Harley-Davidson in 2013.
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