Question: please show work so i may understand how to do the calculations. thank you! Sales of Volkswagen's popular Beetle have grown steadily at auto dealerships

please show work so i may understand how to do the calculations. thank you!

Sales of Volkswagen's popular Beetle have grown steadily at auto dealerships in Nevada during the past 5 years (see table below). Trend projection using linear regression with a=435,b=27 was found to be a good forecasting method. What would be year 6 's forecast? What is the mean absolute deviation (MAD) for all possible periods? Select one: a. 468;MAD=6 b. 597;MAD=10.8 c. 462;MAD=54 d. 441;MAD=1 e. 597;MAD=9

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