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.

MonthJanFebMarAprMayJunJulAug
Takings (× 10 000)543.54.54566

You can make the following line graph.
the line diagram