Problem:
The following time series data represent the yearly amounts spent on advertising (in millions of dollars) by a large toy company:
17.1, 19.0, 18.8, 20.9, 22.0
This series of data begins in year 1998 (i.e., time period t = 1 corresponds to 1998). Using regression analysis, a linear trend line of the form Tt = 16.04 + 1.17t was fit to the data. Using this information, generate a forecast for the total yearly amount of money that will be spent on advertising in 2007.