Page 201 - Maths Class 05

16 Data Handling

Looking Back

Collection of information is called data. Data can be represented graphically to give
clear idea of what it represents. It is easier to interpret and organise data using pictorial

representation. Some of the ways data can be represented pictorially are :

H Pictographs H Tally Graphs

H Bar Graphs H Pie Charts

Example : The number of students in classes I to V on 01-01-2018 in a school are
given below :

Classes I II III IV V

Number of Students 35 40 55 50 45

Represent the above data by a bar graph using suitable scale.
Solution : Process to draw a bar graph :

Þ First choose the scale, as 1 cm = 5 students.

Þ Draw a horizontal line OX, say X-axis and vertical line OY, say Y-axis
that meets at point O.

Þ Mark the equal distances of 1 cm each on Y-axis.

Þ Draw the rectangles of equal width on X-axis with heights

35 40 55 50 45
= 7 cm, = 8 cm, = 11 cm, = 10 cm and = 9 cm.
5 5 5 5 5
Y
Þ Shade the bars and labels the axes
60
as shown here : 55
50
(Use pencil to shade the bars.) 45
Number of Students 30
40
35

25
20
15
10
5
O I II III IV V X
Classes
Mathematics-5 201