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The Challenge: Reading Graphs with Sets of Bars

You already know that bar graphs are used to make comparisons. Some bar graphs, such as the one you will see on the next page, display sets of data with sets of bars. Each set of bars is visually clustered together.

Students need to understand why the bars are grouped visually, with space between each set of bars. Each set of bars will have the same repeated set of labels, or there will be a legend explaining how to interpret the bars in each set.

These types of bar graphs allow for a variety of different comparisons. The shape or pattern of each set can be compared. Or, parts of sets can be compared with like parts of other sets.