1. The following data set contains the number of seats and the average flight-length for 17 aircraft. This data appeared in Contemporary Precalculus with Applications, by the North Carolina School of Science and Mathematics, published in 2000 by Everyday Learning Corporation, Chicago, IL.

\fThe following is computer output from a regression analysis: Dependent variable is: Av. Jan. Temp. No Selector 57 total cases of which 1 is missing R squared = 71.9% R squared (adjusted) = 71.4% S = 7.156 with 56 - 2 = 54 degrees of freedom Source Sum of Squares df Mean Square F-ratio Regression 7080.87 1 7080.87 138 Residual 2765.11 54 51.2057 Variable Coefficient s.e. of Coeff t-ratio prob Constant 108.728 7.056 15.4