Proportion — direct and inverse

What you'll learn

1. 1

   Imagine you're buying 4 identical chocolate bars for £2. If you buy 8 bars, it'll cost £4 — double the bars, double the price!

2. 2

   If 3 apples cost £1.50, how much do 6 apples cost? (direct proportion)

3. 3

   5 pencils cost £1. How much do 20 pencils cost? Let's work it out together.

4. 4

   Now imagine you and 3 friends share a pizza equally. If only 2 friends share it instead, each person gets MORE pizza. That's inverse proportion!

5. 5

   Drag the slider to see how the size of each slice changes as more people share this pizza.

6. 6

   If 6 workers build a wall in 2 hours, how long would 3 workers take? (inverse proportion)

7. 7

   Which pair shows inverse proportion?