noun
correlation diagram; correlation chart
Mathematical or statistical chart showing relationships between variables.
この相関図は、気温とアイスクリームの売上の関係を示しています。
This correlation diagram shows the relationship between temperature and ice cream sales.
noun
character relationship chart
Commonly used for TV dramas, movies, or novels to illustrate how characters are connected.
ドラマの公式サイトに、登場人物の相関図が載っている。
The drama's official website has a character relationship chart.