\begin{exercice}
Déterminer graphiquement une équation de chacune des droites représentées ci-dessous sous la forme $y = mx+p$.
%On donnera des valeurs exactes dans la mesure du possible.
\begin{center}
 \begin{tikzpicture}[general, xscale=0.8, yscale=0.8, scale=0.7]
  \draw [quadrillage] (-3,-2)grid (3,6);
  \axeX{-3}{3}{1}
  \axeY{-2}{6}{1}
  \origine
  \draw [epais, color=A1] (-7/3,-2)--(1/3,6); %(AB)
  \draw [epais, color=G1] (-11/4,-2)--(3,17/3); %(AC)
  \draw [epais, color=D1] (-1/2,6)--(3,-1); %(CD)
  \draw [epais, color=J1] (-3,8/3)--(3,2/3); %(BD)
  \draw [epais, color=B1] (-3,-1)--(3,-1); %(AE)
  \draw [epais, color=F1] (2,6)--(2,-2); %(DE)
  %\pointFigure{0}{0}{O}{color=black, below left};
  %\pointFigure{1}{0}{I}{color=black, below};
  %\pointFigure{0}{1}{J}{color=black, left};
  \pointFigure{-2}{-1}{A}{color=black, below right};
  \pointFigure{-1}{2}{B}{color=black, above left};
  \pointFigure{1}{3}{C}{color=black, right};
  \pointFigure{2}{1}{D}{color=black, below left};
  \pointFigure{2}{-1}{E}{color=black, below right};
 \end{tikzpicture}
\end{center}
\begin{corrige}
\begin{itemize}
 \item $(AB): y = 3x+5$
 \item $(AC): y = \dfrac{4}{3}x+\dfrac{5}{3}$
 \item $(CD): y = -2x+5$
 \item $(BD): y = -\dfrac{1}{3}x+\dfrac{5}{3}$
 \item $(DE): x = 2$
 \item $(AE): y = -1$
\end{itemize}
\end{corrige}
\end{exercice}
