can regression coefficients of variables be used in non linear regression models what is the difference between a linear and a nonlinear model which predictor is the most complex in a regression model? why is a linear regression model no longer necessary can a linear model be linear define linear regression model what is the limit of linear regression? how does it solve? what is a linear model what is the linear relationship what is considered a linear model how to express model with linear function what is the limit of a linear model? what type of regression is a linear model what's the limit of linear regression can a model be a linear model what type of model cannot be expressed as linear which variables can be used to make a linear model what is the limit of linear regression which is a function of a predicting variable? if yes, which is a function of a predicting variable? if yes, which is a nonlinear function of a predicting variable? when yes? how to express a linear model