Scale a circle by its area rather than its radius.
Skills resources are shared. Check your qualification page for its specific assessment conditions.
Proportional symbols
In the printed key, A has radius 2 mm. Area, πr², is proportional to the represented count.
Proportional circle symbols. Original fictional resource; not an official map or real dataset.
On a small screen, scroll the diagram sideways to see the full resource.
Resource description
A represents 6000 people with radius 2 mm; B represents 54000 people. Diagram circles use the corresponding radius ratio.
Use the resource carefully
State the unit and the part of the resource you used. A pattern in a fictional dataset is evidence for that exercise; it does not establish a fact about a real place.
Check whether an explanation is supported by the data or needs additional geographical knowledge. For statistical tasks, a calculated result does not establish causation or significance by itself.