The linear trend forecasting equation for an annual time series containing 22 values (from 1989 to 2010) on total revenues (in millions of dollars) is

a. Interpret the Y intercept,
b. Interpret the slope,
c. What is the fitted trend value for the fifth year?
d. What is the fitted trend value for the most recent year?
e. What is the projected trend forecast three years after the last value?

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,= 4.0 + 1.5X,