Question: In the regression equation y = b0 + b1X1 + b2X2, if b1 = 4, then how much would the predicted value of y differ

In the regression equation y = b0 + b1X1 + b2X2, if b1 = 4, then how much would the predicted value of y differ for two observations that had the same value of X2 but differed by 21 on X1?

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In the regression equation y = b0 + b1X1 + b2X2, if b1 = 4, then how much would the predicted value of y differ for two observations that had the same value of X2 but differed by 21 on X1?

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