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Class 4

Chapter 7: The Cleanest Village

Bar graphs let us compare values quickly. The taller the bar, the larger the value. We can also subtract heights to find a difference.

Learning outcomes

  • Use bar graphs to compare quantities
  • Make decisions from simple data

Activities

  • Compare cleanliness scores across villages

Worked examples

Read through these first, then try the practice below.

  1. Example 1 — Reading a bar graph

    Village A scored 60, B scored 75, C scored 50. Which village is cleanest?

    Solution: Village B with 75.

  2. Example 2 — Difference between bars

    Village A scored 60 and Village C scored 50. How much higher is A?

    Solution: 60 − 50 = 10.

Self-do practice

Question 1 of 3 · Score 0/0

In a bar graph, which village had the LEAST score: A=70, B=85, C=60, D=90?

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