MA21-02 Maths Coming soon
Recognise and interpret inverse proportion
MA21-02
This lesson is coming soon.
In this lesson
State whether a given proportion statement describes a direct or an inverse relationship, and translate 'X is inversely proportional to Y' into 'X is proportional to 1/Y'.
What it covers
- Reading a proportion statement and classifying it as direct or inverse before calculating anything
- Translating 'X inversely proportional to Y' into 'X proportional to 1/Y'
- Interpreting (not yet solving) an inverse-proportion equation such as y=k/x
- Contrasting a direct-proportion statement and an inverse-proportion statement side by side, same context, opposite relationship
Key words
For: AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | R13 | Understand that X is inversely proportional to Y is equivalent to X is proportional to 1/Y |
| Edexcel GCSE 1MA1 | R13 | Understand that X is inversely proportional to Y is equivalent to X is proportional to 1/Y; interpret equations that describe direct and inverse proportion |
| Eduqas GCSE C300 | FR14 | Understand that X is inversely proportional to Y is equivalent to X is proportional to 1/Y; interpret equations that describe direct and inverse proportion |
| Eduqas GCSE C300 | HR14 | Understand that X is inversely proportional to Y is equivalent to X is proportional to 1/Y; construct and interpret equations that describe direct and inverse proportion |
For teachers
This GCSE Maths lesson teaches recognise and interpret inverse proportion. By the end, students should be able to state whether a given proportion statement describes a direct or an inverse relationship, and translate 'X is inversely proportional to Y' into 'X is proportional to 1/Y'. It works through two worked examples and the mistakes examiners report.