Part 6:
Component Bar Charts

Example 6


Suppose we wish to illustrate the information below, representing the number of people participating in the activities offered by an outdoor pursuits centre during June of three consecutive years.
 
1995
1996
1997
Climbing
21
34
30
Caving
10
12
21
Walking
75
85
100
Sailing
36
36
40

Solution:
The first thing we have to do is to total the number in each year so that we can establish how high the vertical axis must be.

We see that the highest total is 191, so our vertical axis needs to reach the round figure of 200.

 
1995
1996
1997
Climbing
21
34
30
Caving
10
12
21
Walking
75
85
100
Sailing
36
36
40
Total
142
167
191