Orange3 contains a number of regression widgets, but they all seem to be univariable i.e. one independent variable that correlates to one dependent variable. When I have more independent variables that might influence a dependent variable, how to handle this in Orange3?
The regression models are multivariable. You can go to the training videos of Orange to learn how to do regression.
I found out how to do multivariable linear regression in Orange. The trick is feeding the linear regression widget with the right features (4 in this case, see picture) and target variable and then getting the regression formula/coefficients out using a data widget, see screenshot.