Use this method to fit a parabola

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The regression models that we introduced in Sections 2 and 6 are linear in the x's, but, more important, they are also linear in the β's. Indeed, they can be used in some problems where the relationship between the x's and y is not linear. For instance, when the regression is parabolic and of the form

we simply use the regression equation μ_Y|x = β₀ + β₁x₁ + β₂x₂ with x₁ = x and x₂ = x₂. Use this method to fit a parabola to the following data on the drying time of a varnish and the amount of a certain chemical that has been added:

Also, predict the drying time when 6.5 grams of the chemical is added.

Reference no: EM131137281

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