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Direct proportion describes relationships where one quantity increases at the same rate as another. Higher-tier students work with algebraic representations including y is proportional to x squared or x cubed.
Our tutors see these errors again and again. Knowing them in advance gives you a head start.
Confusing direct and inverse proportion
Forgetting to find the constant of proportionality k before solving
Not squaring or cubing x when the proportion is to a power of x
This topic is tested by the following exam boards. Our tutors are specialists in each one.
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