Question: Find the a) explained variation b) unexplained variation c) total variation d) coefficient of determination, e) standard error of estimate Se . In each case, there is sufficient evidence to support a claim of a linear correlation so that it is reasonable to use the regression equation when making predictions.

CPI and Subway fare. The Consumer Price Index (CPI) and the cost of subway fare from Table 10-1 in the Chapter Problem are listed below.

CPI 30.2 48.3 112.3 162.2 191.9 197.8

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Subway Fare 0.15 0.35 1.00 1.35 1.50 2.00