which variable is always a constant in the linear regression why do we say that the variance of the error terms of the regression model is constant? is the variance constant or variable in regression do regression models give constant variance? why is variance constant why does regression analysis say that error terms have a constant variance why do we say that the variance of the error terms is constant? why do we say that the variance of the error terms is constant? why is the variance constant in a regression model why do linear regression models have constant variable variance why is the variance for a linear regression constant why are i always thinking that variance of the error terms is constant? why does a linear regression model say the variance of an error term is constant why do we say that the variance of error terms is constant? why do we say the variance of the error terms is constant why do we say that the variance of the error terms are constant? why does linear regression model say that a variable has constant variance why do we say that the variance of the error terms is constant how do we know when a variance variable for a linear regression is constant why is it important to keep the variance of the error term constant in linear regression