Question: Given a data set relating sales and promotions: Year 1 2 3 4 5 6 7 Sales 74 79 80 90 105 142 122 a)
Given a data set relating sales and promotions: Year 1 2 3 4 5 6 7 Sales 74 79 80 90 105 142 122 a) Forecast the level of sales in year 8.
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