You manage the sales of consumer electronics for a regional discount retailer You're putting together your sales forecast for the upcoming year and would like to support that forecast with a statistically sound analysis using factors that you think will influence sales volume. You decide to focus on marketing expense and the number of stores as the two variables most likely to influence the level of sales. The historical levels of Sales Volume, Marketing Expenditures and Number Stores for the last 10 years are as follows: Sales Volume (y) Previous Marketing Expense (x1) Number of Stores (2) Year (n millions) (n millions) 26 1.8 35 1993 31 2.3 1994 28 1995 30 40 1996 2.8 38 1997 3.0 1998 41 3.4 1999 44 49 2000 40 3.6 43 Which of the following equations represents the estimated regression line for the above data? A, y bo X1 X2 D. None of the above Choose correct option