Question: The second order polynomial time series regression model contains a variable W and a regression equation of y = 4 0 0 + 3 W

The second order polynomial time series regression model contains a variable W and a regression equation of y =400+3W +2W2 to forecast future values. If W represents a time period, what are the forecast and forecast error for time period 2 if the actual value for time period 2 is 500? Select the best answer.
forecast value =465; forecast error is 35
forecast value =414; forecast error is 86
forecast value =406; forecast error is 194
forecast value =500; forecast error is -86

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