This key facts covers What is Proportion? within Proportion for GCSE Mathematics. Revise Proportion in Number for GCSE Mathematics with 12 exam-style questions and 22 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 2 of 15 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 15
Practice
12 questions
Recall
22 flashcards
What is Proportion?
- Definition: A relationship where one quantity changes in a predictable way when another changes
- Direct proportion: Both quantities increase/decrease together
- Inverse proportion: One increases as the other decreases
- Symbol: ∝ means "is proportional to"
- Constant: k is the constant of proportionality