(a) Construct a time series plot. ) i) Comment on the appropriateness of a linear trend. The time series plot shows that a curvilinear trend may be more appropriate. The time series plot shows that a linear trend is most appropriate. The time series plot shows that neither a linear nor a curvilinear trend is appropriate. Tt= (c) Using the trend equation developed in part (b), forecast revenue (in millions of dollars) in year 11 . (Round your answer to two decimal places.) $ nillion