Graphs
You can make the presentation of statistical material
clearer,  more  vivid  and  interesting  by  the  use  of
well-planned graphs. Subjects, such as the growth of
manufacturing in the United States, the breakdown of
our budget dollar or comparisons of living standards, are
best presented with graphs. They require very little
special  skill  in  presentation.
Most graphs fall into one of the four categories, as
shown in figure 6-4. These categories are as follows:
The  line  graph  is  used  to  demonstrate  trends  and
changes that take place in such items as income and
population.
The  bar  graph  is  another  type  used  to  show
information   of   a   comparative   nature.   The   major
difference between the bar graph and the line graph is
that the former need not show any passage of time.
Figure 6-4.-Line, pie, bar and picture graphs (GRAPHS FOR DISPLAY ONLY).
6-19