Question

How do we compare correlation to regression?

How do we calculate regression?

Answer 1

Correlation is a statistical measure that determines the association or co-relationship between two variables. Regression describes how to numerically relate an independent variable to the dependent variable.

regression equation:

$y=ax+b$

where

$a=\frac{n\sum xy-\sum x\sum y}{n\sum x^2-(\sum x)^2}$

$b=\frac{\sum y\sum x^2-\sum x\sum xy}{n\sum x^2-(\sum x)^2}$