Question: Based on the graph below. Monthly data on sales for your product over the past 12 months is shown below. a) Discuss linear trend model

Based on the graph below. Monthly data on sales for your product over the past 12 months is shown below.

Sales260025002400230022002100200002468101214

a) Discuss linear trend model fit to the data. 

b) What outcome would you expect if you used a simple moving average to forecast sales for the product pictured above?
 

Sales 2600 2500 2400 2300 2200 2100 2000 2 4 8 10 12 14

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