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Question: Shown below are dollar figures for commercial and industrial loans at all commercial banks in the U.S. as recorded for the month of April during a recent 9-year period and published by the Federal Reserve Bank of St. Louis. Plot the data, fit a trend line, and discuss the strength of the regression model. In addition, explore a quadratic trend and compare the results of the two models.
Year
Loans ($ billions)
1
741.0
2
807.4
3
871.3
4
951.6
5
1033.6
6
1089.8
7
1002.6
8
940.8
9
888.5
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