Question: After a somewhat uncertain start, e-commerce sales in the United States have been growing for the past several years. Shown below are quarterly adjusted e-commerce

After a somewhat uncertain start, e-commerce sales in the United States have been growing for the past several years. Shown below are quarterly adjusted e-commerce sales figures ($ billions) released by the Census Bureau for the United States over a three-year period. Use these data to determine the equation of a trend line for e-commerce sales during this time and use the trend €œmodel€ to forecast e-commerce sales for the third quarter of the year2013.

Sales ($ billions) 38.7 39.9 41.8 44.5 46.1 47.4 48.6 51.6 53.1 54.9 57.0 Year Quarter 2010 4 2011 4 2012

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