Data Analysis: E-Commerce The table showsthe retail e-commerce sales (in billions of
Chapter 7, Problem 49(choose chapter or problem)
Data Analysis: E-Commerce The table showsthe retail e-commerce sales (in billions of dollars) inthe United States from 2007 through 2009. (Source:U.S. Census Bureau)(a) Find the least squares regression parabolafor the data, where represents theyear with corresponding to 2007, by solvingthe system for and(b) Use a graphing utility to graph the parabola and thedata in the same viewing window. How well doesthe model fit the data?(c) Use the model to estimate the retail e-commercesales in the United States in 2015. Does youranswer seem reasonable?
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