There are two types of regression analysis namely Simple and Multiple regressions.
Simple regression involves two variables, the dependent variable and one independent variable.
Multiple regression involves many variables, one dependent variable and many independent variables. These coefficients will be generated automatically after running the simple regression procedure. It is important to understand the concept of Residuals . It does not only help you to understand the analysis, they form the basis for measuring the accuracy of the estimates and the extent to which the regression model gives a good account of the collected data. A simple correlation analysis between y and y' gives an indication of the accuracy of the model.