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Step 5: Draw bars of equal width and height as calculated in the step 4 at the points marked in
step 2 as shown in the bar graph.

Example 3: The following are the number of students admitted in a school in different classes:
Classes VI VII VIII IX X XI XII

No. of Students 20 26 30 34 24 32 34
Draw the bar graph to represent the above information.

Solution: Step 1: On a graph paper, draw a Y
horizontal line as X-axis and
a vertical line as Y-axis.

Step 2: Mark points at equal intervals
along horizontal line (X-axis).
Below these points write the
class whose value is to be
plotted.
Step 3: Choose a suitable scale. Let
the scale be 1 unit = 10 small X
divisions = 5 students.
Step 4: The heights of the bars are as
given alongside.

Example 4: The following table gives the number of students in Class VI in a school during academic years
2014–15 to 2018–19.

Academic Year No. of Students Scale:

2014–15 50 Y-axis: 10 divisions = 25 students
2015–16 75
2016–17 125
2017–18 150
2018–19 200
Represent the above data by a bar graph.

Solution: To represent the above data by a bar graph, we

first draw a horizontal and a vertical line. Since
five values of the numerical data are given. So,

we mark five points on the horizontal line at equal 2014-15 2015-16 2016-17 2017-18 2018-19
distances and draw rectangles of the same width
at these points. The heights of the rectangles are

proportional to the numerical values of the data
(Bar graph showing students of
as shown in the adjoining Fig. Class VI during 5 academic years)