Suppose the following table is a forecast of worldwide annual cell phone handset sales, Year X 3 5 7 Sales y (millions) 400 500 850 (X = 3 represents 2003). Complete the following table. X y xy x2 W 400 UT 500 7 850 Totals Obtain the associated regression line. (Round coefficients to two decimal places.) y ( x ) = Use your regression equation to project the 2008 sales (in millions). (Round your answer to two decimal places.) million sales