A Polynomial Regression Model Is Specified As:
A)Y_i = ?₀ $\begin{array} { l } 2 \\i\end{array}$

Multiple Choice

A polynomial regression model is specified as:

A) Y_i = ?₀ + ?₁X_i + ?₂X $\begin{array} { l } 2 \\i\end{array}$ + ??? + ?_rX $\begin{array} { l } r\\i\end{array}$ + u_i.
B) Y_i = ?₀ + ?₁X_i + ? $\begin{array} { l } 2 \\1\end{array}$ X_i + ??? + ? $\begin{array} { l } r \\1\end{array}$ X_i + u_i.
C) Y_i = ?₀ + ?₁X_i + ?₂Y $\begin{array} { l } 2 \\i\end{array}$ + ??? + ?_rY $\begin{array} { l } r \\i\end{array}$ + u_i.
D) Y_i = ?₀ + ?₁X_1i + ?₂X₂ + ?₃ (X_1i × X_2i) + u_i.