# R-squared Value

gives the percentage of variation between two dataset - It can't show positive or negative relationship like Pearson Correlation
- But it can reliably show if two dataset has relationship
- And
doesn't have any scale influence, so same relation with different scale with get same value. - As
only works with Continuous variable. For discrete variables, see Mutual Information

R^2 Formula

means 81% relation is explained by the features than mean

- R-squared value always increases with the addition of features even if the feature doesn't have a high co-relation, so most of the time we rely on Adjusted R-squared Value