Ordinary Least Squares regression, explained with a simple fit chart
mdancho84 · x · 2026-07-24
Ordinary Least Squares, in one chart
The post introduces Ordinary Least Squares (OLS) as the most common form of linear regression: it finds the best-fitting linear equation relating a dependent variable to one or more independent variables.
The attached chart illustrates the idea visually: a regression line is fit through scatter points, with vertical gaps showing residuals between observed values and the line.
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