β1=SxySxxbeta sub 1 equals the fraction with numerator cap S sub x y end-sub and denominator cap S sub x x end-sub end-fraction
There are two primary ways to write the Sxx formula. One is based on the definition (the "definitional" formula), and the other is optimized for quick calculation (the "computational" formula). 1. The Definitional Formula Sxx Variance Formula