Skip to content
Skip to main content

About this free course

Download this course

Share this free course

Teaching mathematics
Teaching mathematics

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

Bar charts

Bar charts are used to represent categorical data, such as favourite colours, and discrete numerical data, such as the number of children in a group of families.

In a bar chart the height of each bar represents the frequency corresponding to each category (Figure 18).

A bar chart showing favourite genres of films.
Figure 18 A bar chart

Activity 12 Reading data from a bar chart

Timing: Allow 5 minutes
  1. How many people prefer sci-fi films?
  2. How many people like comedy and romance films?
  3. How many people were asked in this survey?


  1. Two people prefer sci-fi films.
  2. There are 21 (10 + 11) people who like comedy and romance films.
  3. A total of 36 people were asked (the sum of the frequencies).