In multiple regression, what does the slope coefficient represent for a predictor's effect on the response?

In multiple regression, what does the slope coefficient represent for a predictor's effect on the response?

• A. It shows the relationship without controlling for other predictors.
• B. It represents the average change in Y for a one-unit increase in X, while holding all other predictors constant.
• C. It is the correlation between the predictor and the response.
• D. It is the standard error of the regression.

Answer: (B)