Data Analysis: Online Shopping The table shows the projected numbers (in millions) of
Chapter 7, Problem 45(choose chapter or problem)
Data Analysis: Online Shopping The table shows the projected numbers (in millions) of people shopping online in the United States from 2003 to 2005. (Source: eMarketer) (a) Use the technique demonstrated in Exercises 6770 in Section 7.3 to set up a system of equations for the data and to find a least squares regression parabola that models the data. Let represent the year, with corresponding to 2003. (b) Use a graphing utility to graph the parabola and the data in the same viewing window. How well does the model fit the data? (c) Use the model to estimate the number of online shoppers in 2008. Does your answer seem reasonable?
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