Sum of Squares: Residual Sum, Total Sum, Explained Sum, Within

Introduction to residuals and least-squares regression

Weighted Least Squares: Simple Definition, Advantages & Disadvantages

Sum of Squares - Definition, Formula, Proof and Examples

Find a point within a triangle such that the sum of the squares of its distance from the three vertices point is a minimum. Assume vertices of the triangle, (x1, y1), (x2, y2) and (x3, y3).

Introduction to residuals and least squares regression