\begin{tikzpicture}[xscale=3, yscale=1.5]
  \draw [thick, <->] (0,1) -- (0,0) -- (1,0);
  \node [below right] at (1,0) {$x$};
  \node [left] at (0,1) {$y$};
  \draw [fill] (.4,.6) circle [radius=.5pt];
  \node[above right] (.4,.6) {$A$};
\end{tikzpicture}
