The document discusses different types of simple graphs that can be used to represent data, including:
- Line charts to show change over time or compare variables.
- Area charts to show cumulative data or relative contributions over time.
- Column/bar charts to compare values or data categories.
- Pie/doughnut charts to compare parts to a whole.
- Segmented charts to show proportional relationships or part-whole changes over time.
The document provides examples and guidelines for when each type of chart is most appropriate based on the nature of the data.