## Exam-Style Question on Proportion## A mathematics exam-style question with a worked solution that can be revealed gradually |

Question id: 465. This question is similar to one that appeared on a GCSE Higher paper in 2017. The use of a calculator is allowed.

Which of the following statements are correct if \(xy = c\) and \(c\) is a constant.

- (a) \(y\) is directly proportional to \(x\)
- (b) \(y\) is directly proportional to \(\frac{1}{x}\)
- (c) \(y\) is inversely proportional to \(\frac{1}{x}\)
- (d) \(x\) is directly proportional to \(y\)

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If you need more practice try the self-checking interactive exercises called Direct and Inverse Proportion.

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