What is Regression? A measure of the relation between the continuous dependent variable(e.g. output) with one/many discrete/continuous independent variables(e.g. input). In Machine Learning, Regression is a supervised statistical predictive model. Other statistical models are Descriptive model , Prescriptive model etc . Different Types of Regression model in Machine Learning In Machine learning, There are mainly   Three types   of  Regression model. Linear Regression Model  In this type of predictive model, The relationship between the Independent and Dependent Variables can be  represented as straight line(single/multiple particularly where clusters are present). Polynomial Regression Model In this type of predictive model, The relationship between the Independent and Dependent Variables can be  represented as polynomial