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Consider the First-Order Regression Model $\hat{ y }$ = 15 + 6x₁+ 5x₂ + 4x₁x₂

Question 28

Multiple Choice

Consider the first-order regression model $\hat{ y }$ = 15 + 6x₁+ 5x₂ + 4x₁x₂. A unit increase in x1 increases the value of y on average by:

A) 5.
B) 30.
C) 26.
D) an amount that depends on the value of x₂.

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