【24＿集合場所問題】コマ大数学科

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\begin{tikzpicture}
    % 碁盤の目(格子状)を描く
    \foreach \x in {0,1,...,8}
    {
      \draw (\x,0)--(\x,8);
      \draw (0,\x)--(8,\x);
      \node at (\x,0)[below]{\x};
      \node at (0,\x)[left]{\x};
    }
    % それぞれの位置を定義
    \filldraw [fill=cyan] (1,2.5) circle (0.1) node [right]{1人};
    \filldraw [fill=red] (3,7.5) circle (0.1) node [right]{5人};
    \filldraw [fill=green] (5,3.5) circle (0.1) node [right]{2人};
    \filldraw [fill=green] (6,5.5) circle (0.1) node [right]{2人};
    \filldraw [fill=yellow] (7,1.5) circle (0.1) node [right]{3人};
  \end{tikzpicture}