It is one dimensional
diagram. it is also known as pillar diagram or column graph. the height of
the bar is proportional to the value of an element.
when the variations are
small this method is very effective. The vertical axis indicates the
production of commodity while the horizontal shows various regions or time
period.
Method: -Find out the
highest and lowest values of data. Accordingly select a scale. Plot the
points that will determine the height of bars. draw pillars or bars upto
the plotted heights.
uses: - Bar graph is very useful for comparative
study of elements of various regions. Agricultural production, Industrial
productions, etc.