The trend line = 500 + 30t,(t = 1,2,3,....,20),and the seasonal indexes shown in the table below were computed from five years of quarterly sales data.Forecast the sales for the next four quarters.

Question

The trend line  = 500 + 30t,(t = 1,2,3,....,20),and the seasonal indexes shown in the table below were computed from five years of quarterly sales data.Forecast the sales for the next four quarters.

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The Answer of The trend line  = 500 + 30t,(t = 1,2,3,....,20),and the seasonal indexes shown in the table below were computed from five years of quarterly sales data.Forecast the sales for the next four quarters.

The Trend Line = 500 + 30t,(t = 1,2,3