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Graphing a second-order model. Consider the second-order model

y = 1 + x₁ - x₂ + 2x₁² + x₂²

(a) Graph the relationship between y and x₁ for x₂ = 0, 1, and 2.

(b) Are the graphed curves in part a first-order or second-order?

(d) Do the independent variables x₁ and x₂ interact? Explain.

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Category:- Statistics and Probability
Reference No.:- M92214264

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