Regression Analysis is a statistical tool that enables you to examine the relationship between a dependent variable and an independent variable. It is used for assessing the strength of the relationship between variables. There are different kinds of regression analysis but at their core, all examine the influence of independent variables on dependent variables. involves several variations including linear, nonlinear, and multiple linear. Multiple linear and simple linear are common models. Nonlinear regression analysis is used commonly for complex data sets where independent and dependent variables depict a nonlinear relationship. The regression analysis has several applications such as finance.