Skip to content
Exit presentation

Data Handling and Presentation

Reading a graph someone else drew

A class voted for a favourite sport. The votes were drawn as a bar graph. Nobody has to vote again.

Loading lab…

The rule

Often someone else drew the graph. You need to read the graph.

Find the bars the question names. Then compare them, to see which is more. Or add them.

An empty chart. The scale runs 0 to 20.
Step 1 of 6
  1. An empty chart. The scale runs 0 to 20.
  2. Cricket: 18 votes.
  3. Kabaddi: 10 votes.
  4. Badminton: 14 votes.
  5. Football: 8 votes.
  6. Cricket has the longest bar. It has the most votes.

Example

How many more chose cricket than kabaddi? Cricket has 18 votes and kabaddi has 10. Subtract: 18 − 10 = 8 votes.

Badminton and football together: 14 + 8 = 22 votes.

All four bars added: 18 + 10 + 14 + 8 = 50 votes.

In the lab, tap the bars the question names. Each tapped bar shows its number.

Jump to lesson

This track

  1. 0 Start here
  2. 1 What counts as data
  3. 2 Counting as it happens, in fives
  4. 3 A picture that stands for many
  5. 4 A bar tells you a count, if you read the scale
  6. 5 Reading a graph someone else drew
  7. 6 Picking the right picture
  8. 7 The big picture
  9. 8 Track quiz

Other tracks