In a first-order model with two predictors, $x _ { 1 }$ and $x _ { 2 }$ , an interaction term may be used when the relationship between the dependent variable $y$ and the predictor variables is linear.

Question

Quizplus · Accepted Answer

An interaction term is used when the relationship between the dependent variable and the predictor variables is not purely linear, but rather a combination of linear and non-linear effects.

In a First-Order Model with Two Predictors x1x _ { 1 }x1​

In a First-Order Model with Two Predictors $x _ { 1 }$