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.

Free course

Teaching mathematics

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).

Described image
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?

Discussion

  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).
TM_1

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to University-level study, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371