A group of geography students have measured the pebble roundness index at nine distinct sampling sites along the course of a river from its source to its mouth. The raw data has been compiled into a spreadsheet.
Suggest one appropriate graphical or cartographic method the students could use to present this pebble roundness data to show its relationship with distance from the source.
102 exam-style questions on AQA GCSE Geography Fieldwork. Each one has a worked solution and a mark scheme showing where the marks go.