\documentclass[12pt,a4paper]{report}
\usepackage{tikz}
\begin{document}
\begin{center}
\begin{tikzpicture}[>=latex] 

\draw [thick,->] (-2,0) -- (2,0);
\draw [thin,->](0,-2) -- (0,2);
\draw[thick,->][red,very thick,domain=0:1,samples=1000] plot (\x,{0});

\end{tikzpicture}
\end{center}
\end{document}