An undirected graph is a type of graph where the direction of the edges is not specified.

This pie chart shows the company's sales.

This chart shows the increase and decrease in sales.

The theory of directed graphs is a branch of mathematics.

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

This bar graph shows the sales of each product.

Graph theory is a branch of mathematics that studies the structure of networks.

This is my favorite photograph.

He was scheduled to take a polygraph test.

If you plant this seed, beautiful flowers will bloom.