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The Opposite of Direct
The Opposite of Direct
If 4 workers can build a wall in 6 days, how long would 8 workers take? More workers = less time! When one thing increases and the other decreases in proportion, that's INVERSE proportion. The product of the two values always stays the same.
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Common Mistakes
- WRONG: Using y = kx for inverse (that's direct!) (Should be y = k/x)
- WRONG: More workers take MORE time (Inverse means opposite!)
- RIGHT: Check logic - does your answer make sense?
Now try it yourself
Quiz · Question 1 of 15
Which of the following correctly reads the mathematical statement y ∝ 1/x?
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This topic in real past papers
Every real exam question we've found on inverse proportion, with a full worked answer.