GRAPHS AND STATISTICS

Bar Charts

Learn the reliable method for bar charts, then apply it to 11+ exam-style questions.

1 · WHAT YOU NEED TO KNOW

The idea

Data diagrams must be read using their title, labels, key and scale.

Picture itRead the scale before the bars
2 · THE METHOD

Follow these steps

  1. Read the title, key and axis intervals first.
  2. Extract only the required values.
  3. Perform the requested comparison or calculation and retain the data unit.
3 · WORKED EXAMPLES

See the method in action

Example 1

How many books did the four classes other than Beech read altogether?

  1. The bar heights are 11, 19, 9, 26, 17.
  2. Add Ash, Cedar, Dale and Elm.
  3. The answer is 63.
Answer: 63
Example 2

How many more books did Dale read than Cedar?

  1. The bar heights are 11, 19, 9, 26, 17.
  2. Subtract Cedar's count from Dale's.
  3. The answer is 17.
Answer: 17
4 · ELEVENSPRINT TIP

A useful shortcut

Perform the requested comparison or calculation and retain the data unit.

5 · COMMON MISTAKES

Watch out for these

6 · TRY IT YOURSELF

Three fresh questions

Ready to check the method? You will get three fresh, validated questions.