BIG IDEA
Understand the idea before memorising a rule.
Graphs and probability is part of probability. At Grade 7, the goal is to connect this topic to a clear method, relevant evidence and a final check. You will apply that idea to a real probability question at this grade level.
YOU WILL LEARN TO
- Explain the key ideas in graphs and probability using accurate mathematics vocabulary.
- Apply a reliable method to a new graphs and probability task.
- Check the result and explain why the evidence supports it.
METHOD
A reliable three-step approach
- 1
Identify the information and the unknown.
- 2
Choose a rule or operation and show every step.
- 3
Check the result with estimation, substitution or units.
WORKED EXAMPLE
During a peer-teaching task for Grade 7, a bag has 4 blue counters and 7 red counters. What is the probability of choosing blue?
Model response
The correct answer is 4/11. There are 11 counters and 4 favourable outcomes, so the probability is 4/11.
KNOWLEDGE CHECK