Khan Academy: Squared Error of Regression Line

Proof (Part 1) Minimizing Squared Error to Regression Line.

Proof (Part 3) Minimizing Squared Error to Regression Line.

Video is the third of five related videos about deriving the formula for the least squares regression line. This video continues the algebraic manipulation to start deriving the formula by changing the notation to means instead of...

Video about deriving the formula for the least squares regression line. This final video finishes up the derivation of the formula for line of best fit by solving the system of equations created by the partial derivatives. It finally...

Video is the second of five related videos about deriving the formula for the least squares regression line. This video goes through the algebraic manipulation required at the begining of deriving the formula. [10:35]

Proof (part 2) minimizing squared error to regression line.

Video is the fourth of five related videos about deriving the formula for the least squares regression line. This video shows using partial derivatives and setting them equal to 0 to get closer to deriving the formula for m and b. It...

Video is the first of five related videos about deriving the formula for the least squares regression line. This first video simply shows what the least squares regression line is and gives a basic illustration and generalized formula...

Interpreting slope of regression line.

Covariance, variance and the slope of the regression line.