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Inverse proportion describes situations where one quantity decreases as the other increases. Students must recognise this relationship, use the formula y = k/x, and solve problems involving inverse square and inverse cube relationships.
Our tutors see these errors again and again. Knowing them in advance gives you a head start.
Using direct proportion methods when the relationship is inverse
Forgetting that when x doubles, y halves in inverse proportion
Setting up the formula incorrectly as y = kx instead of y = k/x
This topic is tested by the following exam boards. Our tutors are specialists in each one.
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