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Multiple Bar Charts,Multiple bar charts are extremely useful if you want to present a large amount of information in a small amount of space. Instead of having only one bar at each division on the horizontal axis, there are two (or more) bars, as in Figure 5.1 below.

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Single Line Graphs,The same data can sometimes be presented in either a chart or a graph. Each will have a different impact on the reader.

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Vertical Line Charts,Vertical line charts can be used to present other information as well as frequency. They are especially useful if you want to show changes in a variable in great detail. For example, they could be used to show exact changes over a period of time in:

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Scatter Graphs,Line graphs are used to . the relationship between variables. Scatter graphs are used to help . whether there is an association, or correlation, between two variables, that is, whether changes in one variable are related to changes in the other. They are not used to present facts, but help to answer questions.

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Cartograms,Cartograms are simple maps which provide information about different areas. The information is usually presented in actual numbers and percentages as in Figure . below. They are used to make comparisons between different areas.