\begin{exercice}Même consigne que l'exercice \RefExercice{2F3_completer_tableauVariations}.
 
 \begin{center}
 \begin{tikzpicture}[general,yscale=0.8]
\tkzTabInit[lgt=1.3,espcl=2.85, color, colorC=H4, colorV=H4, colorL=H4, colorT=A4]
{ $x$ / 1,  $f(x)$ / 2}{ $-3$,,$\ldots$}
\tkzTabVar[color=A4]{+/,-/,+/}
\end{tikzpicture}
\end{center}
%\vspace{-1em}
\begin{center}
\begin{tikzpicture}[general, scale=0.8]
 \draw[quadrillage55] (-4,-2.5)grid (4,2);
 \axeX{-4}{4}{1}
 \axeY{-2.5}{2}{1}
 \origine
 \draw[smooth, epais, color=C1] plot coordinates
{(-3,2)(-2,0)(0,-1)(4,-1.5)};
\end{tikzpicture}
\end{center}
\end{exercice}