Online Marketing According to the Forrester Research Interactive Advertising Forecas...

Online Marketing According to the Forrester Research Interactive Advertising Forecast (April 2009), spending on

interactive (online) marketing is projected to increase. The Forrester Research projections are given in the table.

a. Align the years to the number of years since 2008 and write an exponential model for the marketing data. Where does the model from part a fail to fit the scatter plot?

b. Keep the same alignment for input (years) as in part a but also align output (spending) by subtracting 15 billion dollars from each output. Write an exponential model for this alignment.

c. What impact did aligning the output data in part b have on the fit and the end behavior?