tzplot 패키지를 이용하여 위 질문의 그래프를 그리면:

\documentclass{standalone}
\usepackage{tzplot}

\begin{document}

\begin{tikzpicture}
\tzhelplines(-5,-10)(5,10)
% axes
\tzaxes*(-5,-10)(5,10){$x$}[b]{$y$}[l] %% bounding box
\tzticksx(-3pt:3pt){-4,-2,2,4}[yshift=-3pt]
\tzticksy(-3pt:3pt){-8,-6,-4,-2,2,4,6,8}[xshift=-3pt]
\tzshoworigin{O}
% functions
\def\Fx{(\x)^2}
\def\Gx{-(\x)^2}
\tzfn[very thick]\Fx[-3.2:3.2]
\tzfn[very thick,red]\Gx[-3.2:3.2]
\tznode(2.5,6){$y=x^2$}[r]
\tznode(2.5,-6){$y=-x^2$}[r]
% lines and mid-arrows
\settzmidarrow{Bar[black,sep]Bar[black]}
\tzline[teal,-->--](2,0)(2,4)
\tzline[teal,-->--](2,0)(2,-4)
\settzmidarrow{Bar[black]}
\tzline[teal,-->--](-3,0)(-3,9)
\tzline[teal,-->--](-3,0)(-3,-9)
\end{tikzpicture}

\end{document}