\begin{frame} \frametitle{Polynomials of Degree 3: Cubic Functions} \begin{block}{} A polynomial of degree $3$ is a \emph{cubic function}:\vspace{-.5ex} \begin{talign} f(x) = ax^3 + bx^2 + cx + d \end{talign}\vspace{-3ex} \end{block}\medskip \begin{center} \scalebox{.6}{ \begin{tikzpicture}[default] \diagram{-2}{2}{-2}{3}{1} \diagramannotatez \diagramannotatex{-1,1} \diagramannotatey{-1,1} \draw[cblue,ultra thick] plot[smooth,domain=-1.67:1.53,samples=20] (\x,{pow(\x,3)-\x+1}); \end{tikzpicture} }\\ {\small $x^3-x+1$} \end{center} \end{frame}