Question: A multiple regression model has the form: = 8 + 3x1 + 5x2 - 4x3. As x3 increases by one unit, with x1 and x2

A multiple regression model has the form: = 8 + 3x1 + 5x2 - 4x3. As x3 increases by one unit, with x1 and x2 held constant, the y on average is expected to

Increase by 1 unit

Increase by 12 units

Decrease by 4 units

Decrease by 16 units?

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