This key facts covers Types of Proportion within Proportion for GCSE Mathematics. Revise Proportion in Number for GCSE Mathematics with 12 exam-style questions and 22 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 3 of 16 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 3 of 16
Practice
12 questions
Recall
22 flashcards
Types of Proportion
| Type | Relationship | Formula | Graph | Example |
|---|---|---|---|---|
| Direct | y ∝ x | y = kx | Straight line through origin | Distance ∝ Time (constant speed) |
| Inverse | y ∝ 1/x | y = k/x or xy = k | Hyperbola (curve) | Speed ∝ 1/Time (fixed distance) |
Keep building this topic
Read this section alongside the surrounding pages in Proportion. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Proportion
y is directly proportional to x. Which equation could represent this relationship?
Explain how you can tell from a graph whether two quantities are in direct or inverse proportion.
Quick Recall Flashcards
12 questions on Proportion — practise free
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