How this calculator works
Enter sum of x, sum of y, sum of xy, sum of x², number of pairs. CalcStack applies the displayed formula and reports each intermediate planning value with the units shown.
Formula / method
Slope = (nΣxy−ΣxΣy) ÷ (nΣx²−(Σx)²); intercept = (Σy−slopeΣx) ÷ n
Worked example
The entered summary statistics yield a slope of about 1.357 and intercept −0.964.
Assumptions and limitations
Paired observations are appropriately summarized and a linear relationship is meaningful.
Outliers, residual diagnostics, uncertainty and causation are not evaluated.