Data-rich documents usually include text, tables and graphs. Ensure that:

• all contribute to the discussion
• any repetition of content between text, tables and graphs is for a good reason
• the elements do not contradict each other
• the data are presented in the most suitable form (Showing discusses this topic in detail)
• the rules for correct presentation of text, tables and figures are followed (see Showing).

Graphs should use industry-standard formats and terminology, and work with tables and text to illustrate the points you are making. Keep them simple and clear. If your audience may not be comfortable with statistics, data and mathematics, help them to understand by writing plain English aided by instructive, uncluttered graphs.

Data can be very persuasive because they take us away from the realm of opinion, but only if presented in a comprehensible, logical and clear way.