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

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 Ts-Model-2:

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. An exponential trend model provides an appropriate fit.)
b. Compute the appropriate forecasting equation.
c. Forecast the value for 2013?

Year Series I Series II 2001100.0 2002 115.2 2003 130.1 2004144.9 2005160.0 2006 175.0 2007 189.8 2008204.9 2009 219.8 2010 235.0 2011 249.8 2012 264.9 100.0 115.2 31.7 150.8 174.1 200.0 230.8 266.1 305.5 351.8 403.0 469.2 051040065139 021900898089

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