Graphing a first-order model consider the first-order, Ask an Expert

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Graphing a first-order model. Consider the first-order equation

y = 1 + 2x₁ + x₂ - 3x₃

(a) Graph the relationship between y and x₁ for x₂ = 1 and x₃ = 3.

(b) Repeat part a for x₂ = -1 and x₃ = 1.

(c) If a linear model is first-order in three independent variables, what type of geometric relationship will you obtain when E(y) is graphed as a function of one of the independent variables for various values of the other independent variables?

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