Avec TikZ :
\documentclass{beamer}
\usepackage{tikz}
\begin{document}
\begin{frame}
\begin{tikzpicture}
\node (picture) {\includegraphics{example-image-duck}};
\draw[red,thick] (0,2) -- (0,-2);
\node[red] at (0.4,1.8) {x=0};
\draw[green,thick] (-3.2,1) -- (0,1);
\node[green] at (-3.6,1) {1{,}5};
\end{tikzpicture}
\end{frame}
\end{document}\end{document}
![alt text][1]
[1]: https://texnique.fr/osqa/upfiles/document-1.png
