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Graph interpretation and data analysis questions appear on both papers and can carry significant marks. Being able to read, draw, and interpret graphs accurately is essential for accessing marks across all three assessment objectives.
This lesson covers everything you need to know about handling data and graphs in Edexcel GCSE Biology.
Choosing the correct graph type is important — using the wrong type can lose you marks.
| Data Type | Graph Type | Example |
|---|---|---|
| Continuous independent variable (numbers on a scale) | Line graph | Temperature vs. enzyme activity |
| Categoric independent variable (named groups) | Bar chart | Type of fruit juice vs. vitamin C content |
| Proportion/Percentage of a total | Pie chart | Percentage of different blood types in a population |
Exam tip: In GCSE Biology, you will most commonly need to draw or interpret line graphs (for continuous data like temperature, time, concentration) and bar charts (for categoric data like species, type of drug).
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