If the data are available on the response variable y and the explanatory variable x,and the fit of the quadratic regression model y = β₀ + β₁x + β₂x² + ε is to be tested,standard linear regression can be applied on ________. A) y and x B) y,x,and x² C) y,xy,and x² D) y,y²,and x²

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The quadratic regression model can be rewritten as a linear regression model by creating a new variable x^2. The new model is y = β0 + β1x + β2x^2 + ε, which can be fit using standard linear regression.

If the Data Are Available on the Response Variable Y