TYPES OF GRAPHS
Graphs represent
visual aids of depicting numerical
or qualitative relationships. Graphs may be broadly classified as statistical and mathematical. For the purpose
of instructional aid, we make use of statistical graphs.
Statistical graphs are the means of presenting the data in a visual form. These are available
in the various forms, given below.
a.
Bar graph
It consists
of bars arranged horizontally or vertically from zero bases. Useful comparisons can be made with the help of
these bars as the size, length or colour of the bars visualizes the different
values.
b.
The circle or pie graph
It consists of the sectors of a circle shown by different coloures
or types of shadings and serves a useful purpose
for comparison and contrast.
c.
Line graph
It consists of portraying data with the help of lengths and shapes of lines.
d.
The pictorial
graph
In such graphs the visual presentation is made through pictures. The number of sizes of the pictorial
illustration conveys the proportionate amounts for the necessary comparison.
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