A bar graph shows, by varying lengths of parallel lines, comparisons or
trends in quantitative measure. Plot constant values along the x-axis and
dependant or variable values along the y-axis. Providing the information is
kept simple and a legend defines the bar representation, you can display more
than one set of figures on a bar graph.
Figure 2-15 shows a simple bar graph.
Figure 2-15. A bar graph.
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