How do you read bar, pie, and line graphs?
Bar graphs uses the height of different bars that are read for making a comparison of things between various groups or to track changes over time. Pie charts are read to compare parts of a whole. Line graphs show a relationship between two variables that are read for making a comparison of changes over the same period of time for more than one group.
To summarise, bar graphs are read when comparing quantities, line graph is read as its is most effective format to know a relationship between two variables that are both changing; and pie graphs are usually better than line graphs at depicting how an overall group is divided
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