# Statistics » Frequency polygon / line graph

## What is a frequency polygon?

A frequency polygon is a line graph. The points are often not connected with a smooth line, but with straight line segments.

Frequency polygons are used to show the changes over time.

## How do you make a frequency polygon / line graph?

You can do it the same way as you make a graph.

Remember to use the same scale and you are also allowed to use a zigzag on the vertical axis.

*Examples*

In the table you can find the takings of a snack bar.

Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug |

Takings (× 10 000) | 5 | 4 | 3.5 | 4.5 | 4 | 5 | 6 | 6 |

You can make the following line graph.