[Tex/LaTex] Help drawing a very simple number line using TikZ

tikz-pgf

I want to draw a very simple number line, i found some code that got me started here. I have modified the code to get the following picture

enter image description here

The problem is that I want the numbers below the line to show up as {-3,2,1,0,1,2,3} but I can't figure out how to modify the following code to do this. 

\usetikzlibrary{arrows}
\begin{tikzpicture}
\draw[latex-] (-6.5,0) -- (6.5,0) ;
\draw[-latex] (-6.5,0) -- (6.5,0) ;
\foreach \x in  {-6,-4,-2,0,2,4,6}
\draw[shift={(\x,0)},color=black] (0pt,3pt) -- (0pt,-3pt);
\foreach \x in {-6,-4,-2,0,2,4,6}
\draw[shift={(\x,0)},color=black] (0pt,0pt) -- (0pt,-3pt) node[below] 
{$\x$};
\draw[*-o] (0.92,0) -- (2.08,0);
\draw[very thick    ] (0.92,0) -- (1.92,0);

\end{tikzpicture}

It would nice if I could just divide \x by 2 in place of node[below]
{$\x$}, but I don't know how to do this. Thanks!

Best Answer

See the following MWE:

enter image description here

\documentclass[letterpaper]{article}
\usepackage{tikz}
\usepackage{amsmath}
\usetikzlibrary{arrows}
\begin{document}
\begin{tikzpicture}
\draw[latex-latex] (-3.5,0) -- (3.5,0) ; %edit here for the axis
\foreach \x in  {-3,-2,-1,0,1,2,3} % edit here for the vertical lines
\draw[shift={(\x,0)},color=black] (0pt,3pt) -- (0pt,-3pt);
\foreach \x in {-3,-2,-1,0,1,2,3} % edit here for the numbers
\draw[shift={(\x,0)},color=black] (0pt,0pt) -- (0pt,-3pt) node[below] 
{$\x$};
\draw[*-o] (0.92,0) -- (2.08,0);
\draw[very thick] (0.92,0) -- (1.92,0);
\end{tikzpicture}
\end{document}

Here is something that can work for now with the scaling:

\begin{tikzpicture}[scale=2.5]
\draw[very thick] (1,0) -- (2,0);
\path [draw=black, fill=black] (1,0) circle (2pt);
\path [draw=black, fill=white, thick] (2,0.0) circle (2pt);
\draw[latex-latex] (-3.5,0) -- (3.5,0) ;
\foreach \x in  {-3,-2,-1,0,1,2,3}
\draw[shift={(\x,0)},color=black] (0pt,3pt) -- (0pt,-3pt);
\foreach \x in {-3,-2,-1,0,1,2,3}
\draw[shift={(\x,0)},color=black] (0pt,0pt) -- (0pt,-3pt) node[below] 
{$\x$};
\end{tikzpicture}
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