Page 323 - Start Up Mathematics_8 (Non CCE)

Reading a bar graph
We can draw certain conclusion after studying a given bar graph. The process of obtaining various information
related to the given data from a bar graph is known as reading the bar graph.
Example 4: The following table shows the number of hours of sunshine on each day of a week.

Days Monday Tuesday Wednesday Thursday Friday Saturday Sunday

Hours of 3 4 2 7 10 8 7
sunshine
Draw a bar graph for the above data.
Solution:

Scale:
Y
Y-axis: 1 cm = 1 hour
11
10
9
Number of hours of sunshine 6
8
7

5
4
3
2
1
X
0
Mon Tue Wed Thu Fri Sat Sun
Days

Example 5: Study the following bar graph and answer the questions that follow.

Y Scale:
900 Y-axis: 1 cm = 100 students
800
700
Number of students 600
500
400
300
200
100 No. 4 No. 5 No. 6 No. 7 No. 8 No. 9 No. 10
0 X

Shoe numbers

(a) What is the information given in the bar graph?
(b) What are the different numbers of the shoes worn by the students?
(c) Which shoe number is worn by maximum number of students? Also give its number.
(d) Which shoe number is worn by minimum number of students? Also give its
number.

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