8
How do we represent population?
Living in society
We can represent population using
graphs
and
charts
. We often use pie
charts to show
percentages
and bar charts or line graphs to show
changes
in population. Pyramid graphs can be used to show
age groups
.
Pyramid graphs
This pyramid graph shows us the age distribution of Spain’s population
in 2013. The blue bars on the left tell us how many males there are in each
age group. The red bars on the right indicate the number of females in
each age group.
The longest bars indicate the highest number of people. In Spain, there
are more males and females aged 35–39 than any other age. There are
fewer males and females aged between 0 and 19, or aged between
70 and 100. What other information does the pyramid graph give us?
1
Classify these charts and graphs in your notebook.
line graph pie chart pyramid graph bar chart
a)
b)
100+
90-99
80-89
70-79
60-69
50-59
40-49
30-39
20-29
10-19
0-9
1.5 1.0 0.5 0 0 0.5 1.0 1.5
c)
1980 1990 2000 2010
325
300
275
250
225
200
d)
1965 1975 1985 1995
2.50
2.25
2.00
1.75
G
E T T I N G S T A R T E D
100+
90-99
80-89
70-79
60-69
50-59
40-49
30-39
20-29
10-19
0-9
4 3 2 1 0 0 1 2 3 4
Spain’s population
Age group
Male
Female
(million)
(million)
