Suppose That the Sample Regression Equation of a Model Is $= 10 + 4 x _ { 1 } + 3 x _ { 2 } - x _ { 1 } x _ { 2 }$

question 68

Multiple Choice

Suppose that the sample regression equation of a model is $= 10 + 4 x _ { 1 } + 3 x _ { 2 } - x _ { 1 } x _ { 2 }$ . If we examine the relationship between $x _ { 1 }$ and y for three different values of $x _ { 2 }$ , we observe that the:

• A) three equations produced differ only in the intercept.
• B) coefficient of \(x _ { 2 }\) remains unchanged.
• C) coefficient of \(x _ { 1 }\) varies.
• D) three equations produced differ not only in the intercept term but the coefficient of \(x _ { 1 }\) , also varies.

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