FORECASTING WITH LINEAR REGRESSION EXERCISE Metro ART is a company that manufactures tires. The manager has asked you to prepare a seasonalized demand forecast for year 2021 based on the following data: FORECAST FOR YEAR 2021 YEAR 2020 Period SEASON DEMAND SEASON SEASONAL X 2 XY (X) (Y) AVERAGE FACTOR 1 Spring 200 210 ----------- ----- ----- 2 Summer 100 120 ----------- ----- ----- 3 Fall 50 60 ----------- ----- ----- 4 Winter 750 710 ----------- ----- ----- YEAR 2021 Period TREND SEASONAL FINAL (X) FORECAST FACTOR FORECAST 5 ---------------- --------------- ---------------- 6 ---------------- --------------- ---------------- 7 ---------------- --------------- ---------------- 8 ---------------- --------------- ---------------- _________________________ TOTAL DEMAND FOR YEAR 2021 ---------------