One needs to create interactions between all of the following EXCEPT option B. high school and college. since, the model is using job tenure, it is the only option without work experience.
The polynomial regression model has one, two, or more than two predictor variables. Each predictor variable may be present in various powers. This polynomial model is called a second-order with one predictor variable because the single predictor variable is expressed in the model to the first and second powers.
Therefore, the only predictor variable in all other options is job experience. However, option C. does not have the dominating variable.
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