Directly Proportional and Inversely Proportional
Learn how direct proportion doubles together and inverse proportion halves when one doubles. Let’s get started! 🚀
Video Lesson
Watch and learn the basics
Flashcards
Review key concepts visually
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🛎️ What Is Direct Proportionality?
- In direct proportion, doubling one value will double the other.
- If 1 watermelon costs £4, then 2 cost £8 and 4 cost £16.
🛎️ What Is Inverse Proportionality?
- In inverse proportion, doubling one value will halve the other.
- For a task, 15 people take 2 hours, but 30 people only take 1 hour.
🛎️ Spotting the Difference Quickly
- In direct proportion, the unit rate stays the same.
- In inverse proportion, the product of the two quantities stays the same.
Practice Questions
Test your understanding
Interactive Activity
Adjust the constant k to see how direct and inverse proportion affect a data table
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