A time-series plot often helps you determine the appropriate model to use. For this problem, use each

Question:

A time-series plot often helps you determine the appropriate model to use. For this problem, use each of the time series presented in the following table and stored in TSModel2:

Series I Series II Year 100.0 2005 100.0 115.2 2006 115.2 2007 130.1 131.7 150.8 2008 144.9 2009 160.0 174.1 2010 175.0

a. Plot the observed data Y over time X and plot the logarithm of the observed data (log Y) over time X to determine whether a linear trend model or an exponential trend model is more appropriate.

b. Compute the appropriate forecasting equations.

c. Forecast the values for 2017.

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