Question: please tell how to solve it. A multiple regression model has the form y = 10 + 2X1 + 12X2. As x1 increases by 1

please tell how to solve it.

A multiple regression model has the form y = 10 + 2X1 + 12X2. As x1 increases by 1 unit (holding x2 constant), is expected to increase by how many units

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