Year Revenue 8.53 10.74 12.88 14.21 16.31 17.21 18.47 18.35 18.30 10 18.43 (a) Construct a time series plot. 20 18 16 14 12 10 Revenue ($ millions) Revenue ($ millions) Revenue ($ millions) Revenue ($ millions) 1 2 5 6 8 9 10 11 0 1 2 3 4 5 6 7 8 9 10 11 0 2 34 5 7 8 9 10 11 0 1 3 4 5 6 7 8 9 10 11 O Year Year Year Year Comment on the appropriateness of a linear trend. 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. The time series plot shows that a curvilinear trend may be more appropriate. (b) Using Minitab or Excel, develop a quadratic trend equation that can be used to forecast revenue (in millions of dollars). (Round your numerical values to three decimal places.) (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.) million Submit