Regression from the SPSS output, Math 151
Scatter of sanchez heating--fig2.10 p. 107
Coefficients(a)
Unstandardized Coefficients Standardized Coefficients t Sig.
Model B Std. Error Beta
1 (Constant) 1.089 .139 7.841 .000
DEGDAYS .189 .005 .995 38.309 .000
a Dependent Variable: GAS

 y = 1.089 + .189 x                   Gas = 1.089 + .189Degdays

Degdays r = .995: gas use rises .995 of a standard deviation for every standard deviation Degdays rises.

Model Summary
Model R R Square Adjusted R Square Std. Error of the Estimate
1 .995(a) .991 .990 .3389
a Predictors: (Constant), DEGDAYS

 99.1 % of Sanchez gas use is explained/predicted by degree-days