3. DETAILS The following table shows a company's annual revenue (In billions of dollars) for 2009 to 2014. Year Period (t) Revenue ($ billions) 2009 23.8 2010 2 29.2 2011 37.9 2012 50.1 2013 5 59 9 2014 66.7 (a) Construct a time series plot. 80 Revenue ($ billions) Revenue ($ billions) Revenue ($ billions) Revenue ($ billions) 5 6 1 2 3 5 6 2 3 5 6 1 2 3 4 5 6 7 2 O Period Period Period Period What type of pattern exists in the data? O The time series plot shows a downward linear trend. The time series plot shows a downward curvilinear trend. The time series plot shows an upward curvilinear trend. The time series plot shows an upward linear trend. (b) Develop a linear trend equation for this time series to forecast revenue (In billions of dollars). (Round your numerical values to three decimal places.) (c) What Is the average revenue Increase per year (In billions of dollars) that this company has been realizing? (Round your answer to three decimal places.) billion (d) Compute an estimate of this company's revenue (in billions of dollars) for 2015. (Round your answer to two decimal places.) billion