1. 16 Graph Skills
How to read and understand advanced types of bar charts, area graphs, climographs and triangle graphs
How to advance their skills of drawing bar charts

2. Stacked bar chart

3. What do the colours represent?
What does the red line represent?
How do you ‘interpret’ these charts?

5. Trend graph

8. Pie charts

10. Climograph

13. Triangle graph

17. 3 numbers always add up to 100%
Triangle graphs
100
100
100
100
100
3 numbers always add up to 100%
100

18. Bar charts

19. Simplest form of displaying statistical information
Chapter 16: Graph Skills
Drawing bar charts
Simplest form of displaying statistical information
Best method to use in the exams

20. The following steps should be taken to construct a bar chart:
Chapter 16: Graph Skills
The following steps should be taken to
construct a bar chart:
Always draw a bar chart on graph paper with a ruler
The bar chart should be given a title from the information provided
The X-axis and the Y-axis should be labelled
If the Y-axis is numbered then have equal intervals between the values, for example 10, 20, 30, etc. not 10, 25, 42, 50, etc.
The bars on the bar chart should also be of equal width and colour coded if time allows.

21. Marking scheme for bar charts is as follows: Title: 2 marks
Graph paper: 2 marks
Scaled axis: 2 x 2, 4 marks in total
Information plotted: 2 x 6, 12 marks in total
Chapter 16: Graph Skills

23. Exam questions