This graph shows an inverse proportion relationship.

These two variables are in an inverse ratio.

He showed understanding towards my explanation.

This pie chart shows the company's sales.

This chart shows the increase and decrease in sales.

We have maintained a good relationship for a long time.

His research is deeply related to my project.

This bar graph shows the sales of each product.

The theory of directed graphs is a branch of mathematics.

Graph theory is a branch of mathematics that studies mathematical structures called graphs.