# Line of Best Fit: Least Squares Method (VIDEO!)

Have you ever wondered in fitting a line to data on a scatter plot that you work to minimise the vertical distances of points from the line – not the actual distances (perpendicular to the line)? Or why you square numbers rather than work with the natural thing which would be absolute value?

In this video I explain why we calculate the line of best fit the way we do, and explain the mathematics behind the formula for the best line. It really isn’t that bad

• ## ON-LINE SHORT COURSES!

QUADRATICS, Permutations and Combinations, EXPLODING DOTS, and more!

Written for educators - and their students too! - this website, slowly growing, takes all the content Tanton has developed in his books, videos, and workshops, and organizes it into short, self-contained, and complete, curriculum units proving that mathematics, at all points of the school curriculum, can be joyous, fresh, innovative, rich, deep-thinking, and devoid of any rote doing! Let's teach generations of students to be self-reliant thinkers, willing to flail and to use their common sense to "nut their way" through challenges, to assess and judge results, and to adjust actions to find success. (Great life skills!)

CHECK OUT: www.gdaymath.com