What is Polynomial Regression? Linear Regression vs Polynomial Regression
Polynomial Regression is an Advance method of Linear Regression. Linear Regression draws a line between X and Y data values, we can check how well the relationship between X and Y. Polynomial Regression draws a Curved Line which bends when relationship is unpredictable and non Linear. In a non-linear relationship , the connection between X and Y is not consistent. Sometimes when X increases , Y increases , Other times when X increases , Y decreases , and it can change direction multiple times . Linear Regression → works best when the relationship between X and Y is proportional and predictable . The line just shows how much Y increases when X increases. Polynomial Regression → works best when the relationship is non-linear or unpredictable . The curve bends up and down showing that sometimes X increases Y, sometimes decreases Y, depending on the data pattern.