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www.reference.com/world-view/use-bar-graph-aea3428144343af9

A bar graph is used to compare items between different groups and track changes over a period of time. Bar graphs are best used for changes that happen over a large amount of time instead of just months or weeks.

www.reference.com/world-view/purpose-bar-graph-bbaf5238a10b2a07

A bar graph is a way to visually represent a set of data. Bar graphs are particularly useful for data that is easy to categorize. The category is traditionally placed on the x-axis, and the values are put on the y-axis.

www.reference.com/article/double-bar-graph-d2912529ec5f454d

A double bar graph is a chart that uses parallel bars at proportional lengths that represent quantitative values. The length of the bar correlates with the data.

www.reference.com/article/compound-bar-graph-1d1b2800e335014f

A compound bar graph breaks down data by splitting the columns to represent information comprising each bar. For example, a bar graph representing state employment rates can be turned into a compound bar graph by subdividing each state bar into columns to show unemploym...

www.reference.com/article/should-kids-use-bar-graphs-e04b0a733047a963

Kids should use bar graphs when they are attempting to show how something changes over time or to compare items. Bar graphs work well when comparing items in categories that are related.

www.reference.com/world-view/horizontal-bar-graph-416dbe7a91eaf1de

A horizontal bar graph is a visual representation of data that include a series of horizontal bars representing numerical amounts. Variations in the lengths of the bars allows for quick comparisons.

www.reference.com/article/make-excel-bar-graphs-a890199e0d2aef7e

To make a bar graph in Microsoft Excel, first open the appropriate spreadsheet, and select the data you want to represent. Ensure the data is in columns and that there are no blank cells. Also, name the column and row headers appropriately, as they become labels on the ...