Least squares - Wikipedia
https://en.wikipedia.org/wiki/Least_squaresThe method of least squares is a standard approach in regression analysis to approximate the solution of overdetermined systems(sets of equations in which there are more equations than unknowns) by minimizing the sum of the squares of the residuals (a residual being: the difference between an observed value, and the fitted value provided by a model) made in the results of each individual eq…
Quick Linear Regression Calculator
https://www.socscistatistics.com/tests/regression/default.aspxLinear Regression Calculator. This simple linear regression calculator uses the least squares method to find the line of best fit for a set of paired data, allowing you to estimate the value of a dependent variable (Y) from a given independent variable (X).The line of best fit is described by the equation ŷ = bX + a, where b is the slope of the line and a is the intercept (i.e., the value of ...