If it suits your subject, you might use numerical information, such as statistics, in your document. You can present this information within sentences. Or you might use tables, charts, or graphs, as featured writer Ellen Page did in her informative essay about the use of DDT in preventing malaria.

If you use tables, charts, or graphs, you still need to accurately and fairly present the numerical information in your document and clearly identify the source of the data, just as you would for textual information. For more information about using tables, charts, and graphs, see Chapter 16.