Linear Regression Basics

To Understand Linear Regression basics of Slope, Correlation was useful.

Slope Revision

Finding the slope of a line from its graph: Slope of a line


Slope = Change in Y / Change in X
Slope is constant for a line

Simple Linear Regression

• One Explanatory Variable Simple Regression
• More than one Explanatory Variable multiple Regression
• X - Independant Variable(Explanatory), Y - Dependant Variable (Response)
• Good fitting line (Reasonable for predicting relationship) - Measure of Strength of Relationship (Co-relation)
• Correlation - A & B are observed at Same time
• Methods of Least Squares to estimate B0 and B1
• Residual = Observed - Predicted value (Above Line +ve, Below Line -ve)

Reference Videos

Squared error of regression line: Introduction to the idea that one can find a line that minimizes the squared distances to the points


Happy Learning!!!