Tikzpng

Sample TikZ Code

\begin{tikzpicture}
\draw[->] (-1,0) -- (4,0) node[right] {$x$};
\draw[->] (0,-1) -- (0,4) node[above] {$y$};
\draw[blue,thick,domain=0:3] plot (\x,{\x*\x/2});
\end{tikzpicture}