I'm working on creating a small graph in tikz. However, I'm a bit lazy and don't want to create the actual curve in tikz, but I do want the axes and some text to be done in LateX because it looks much nicer. So I'm basically including a graphic and then doing the tikz picture "on top". However, when I use the following code
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\includegraphics[scale=.5]{fig12.PNG};
\draw [->] (0,0) -- (8,0);
\draw [->] (0,0) -- (0,4);
\end{tikzpicture}
\end{document}
I get
Which isn't quite what I'm looking for =)
When I include the the graphic at the end of the tikz picture, it sits on top of the axes and stuff, and I'd still need to put points and text on top of it. How can I properly position this image?

\node at (0,0){\includegraphics[scale=.5]{fig12.PNG}};and play with the coordinate if needed. – Jun 25 '18 at 16:13