Understanding Polynomial Regression

Capturing non-linear relationships | Data Series | Episode 4.6

This Article expands on Simple Linear Regression and Multiple Linear Regression, ensure you have a good understanding of these two topic areas before continuing.

What is Polynomial Regression?

Polynomial Regression is used to capture non-linear relationships between variables.

For example:

For linear relationships we use Linear Regression.

Overview

Take a look at the following graph looking at the Humidity and Pressure values in Svged, Hungary.

• We can see there is a trend in the data, which is non-linear so we use Polynomial Regression
• The job of Polynomial regression is to find a suitable relationship between Humidity and Pressure, such as the following: