Data Analysis: E-Commerce The table shows the retail
Chapter , Problem 49(choose chapter or problem)
Data Analysis: E-Commerce The table shows the retail e-commerce sales (in billions of dollars) in the United States from 2007 through 2009. (Source: U.S. Census Bureau) (a) Find the least squares regression parabola for the data, where represents the year with corresponding to 2007, by solving the system for and (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 retail e-commerce sales in the United States in 2015. Does your answer seem reasonable?
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