Proof (Part 4) Minimizing Squared Error to Regression Line

[thesixthsense1]

Great work Sal.. videos on Non parametric tests will be very useful for us.. Thanks a ton..

[mss3331]

hehehehe...there is just 3 comments ...why?

[jouassou]

The university textbook provided the formulas

m = [ Σ(x_i - xbar)(y_i - ybar) ]/Σ(x_i - xbar)²

b = ybar - m·xbar

but did a poor job of explaining where these equations came from.

Thanks a lot for an excellent proof, and keep up the good work!

[echelecopao]

Awesome explanation and visualization of the problem.

Now I won't feel like a mindless robot plugging numbers into a formula to get the best fitting line.

[ad2181]

Sal, Excellent insight about the two points on the line, easy to remenber also.