A bar chart scale goes up in 2s: 0, 2, 4, 6, 8, 10, 12. A bar stops halfway between 10 and 12. What does it show?
Reading bar charts and time graphs
Year 4 · Lower Key Stage 2 · 4S-1 — Interpret and present data in bar charts and time graphs
Draft — awaiting teacher review
Builds on: Money, time and pictograms (Year 2)
I
Concept Anchor
Always check what each mark on the scale is worth. To compare two bars, find the difference between them.
Worked example
Bars show 15 books on Wednesday and 8 on Tuesday. How many more on Wednesday?
- 1.Read each bar: 15 and 8.
- 2.'How many more' means find the difference.
- 3.15 − 8 = 7.
II
Guided Check
A scale goes 0, 5, 10, 15, 20. A bar stops halfway between 10 and 15. What does it show?
III
Independent Diagnostic Practice
A bar chart shows books read. Monday: 12. Tuesday: 8. Wednesday: 15. How many more books were read on Wednesday than Tuesday?
A time graph shows a plant's height. At week 2 it is 6 cm. At week 4 it is 10 cm. How much did it grow between week 2 and week 4?