prologues:=3; outputformat:="eps"; outputtemplate:="%j.%o"; beginfig(1); u=1cm; drawarrow (-.5u,0)--(4u,0); drawarrow (0,-.5u)--(0,2u); pickup pencircle scaled 1pt; draw (0,0){up} for i=1 upto 8: ..(i/2,sqrt(i/2))*u endfor; label.lrt(btex 関数$y=\sqrt{x}$ etex, (3,sqrt(3))*u); label.rt(btex $x$軸 etex, (4,0)*u); label.top(btex $y$軸 etex, (0,2)*u); label.llft(btex 原点$O$ etex, (0,0)); endfig; end.