The coefficient of multiple determination for a multiple reg

The coefficient of multiple determination for a multiple regression model with
two explanatory variables X₁
and X₂

Answer

measures the variation around the predicted regression equation.

measures the proportion of variation in Y that is explained by X₁ and X₂.

measures the proportion of variation in Y that is explained by X₁ holding X₂
constant.

will have the same sign as b₁.

		measures the variation around the predicted regression equation.
		measures the proportion of variation in Y that is explained by X₁ and X₂.
		measures the proportion of variation in Y that is explained by X₁ holding X₂ constant.
		will have the same sign as b₁.

Answer: measures the proportion of variation in Y that is explained by X₁ holding X₂