Frequency Polygon - GCSE Maths Definition

A frequency polygon is a type of graph that helps you understand and compare data by showing how often something happens. To make a frequency polygon, you first gather all your data into groups, or "class intervals," then find the midpoint of each group. You plot these midpoints on a graph and connect them with straight lines. Along the horizontal axis, you have the values or categories, and on the vertical axis, you have the frequency, which means how often each group occurs. Frequency polygons are useful for visualising trends and comparing different sets of data, making it easier to see patterns and differences at a glance.