Page 198 - Start Up Mathematics_5

Example 6: A group of students take up a Can Recycling drive. Here is a table that gives
the number of cans recycled by each student. Represent it by a bar graph.

Name of student Number of cans recycled
Rajiv 50

Raghav 45
Mithun 60

Anurag 25

Solution: Let’s first choose a scale for the graph. To do so, note the highest and the
lowest values of the data. Then choose a scale that can fit the highest value
easily on the graph and make the bar with Remember
the lowest value clearly visible. Thus 5 or
10 can be chosen as the scale for the given On a graph paper, the dark
data. Let’s take 10 as the scale. We can lines are 1 cm apart and the
present it as a vertical or horizontal graph. light lines are 1 mm apart.
Vertical Graph

Scale on X-axis (Horizontal line): 1 cm = 1 student
Scale on Y-axis (Vertical line): 1 cm = 10 cans

Number of cans recycled by students
Y-axis X-axis: 1 cm = 1 student
Y-axis: 1 cm = 10 cans
60

50

40
Number of cans 30

20

10
Rajiv Raghav Mithun Anurag

0
Students X-axis

Horizontal Graph

Scale on X-axis (Horizontal line): 1 cm = 10 cans
Scale on Y-axis (Vertical line): 1 cm = 1 student

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