10 Word Problems on Direct and Inverse Proportion by Pattern — Solving by Determining Whether to 'Divide to Keep Constant' or 'Multiply to Keep Constant'

Introduction: Starting by confirming what you can already doYou should already be able to do multiplication and division. You ...
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Key points about equations of direct and inverse proportion

In this graph, 𝑥 and 𝑦 are directly proportional. This means that when 𝑥 doubles, 𝑦 also doubles, and when 𝑥 triples, so does 𝑦. In fact, for all coordinates on this line, you could multiply or ...
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apt4Maths: PROPORTIONALITY PowerPoint for GCSE Maths (Lesson 8 of 8 on Ratios and Proportion)

PowerPoint Presentation on Proportionality (16 slides): Explains direct and inverse proportionality, how to find the constant in proportionality equations, how to solve proportionality problems, and ...
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Direct proportion worksheet (with solutions)

A worksheet on direct proportion. The problems require to calculate the constant of proportionality using the given information and then use the resulting equation to calculate the value of the one of ...
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Module 7 (M7) – Algebra - Proportion and Variation

There is a direct proportion between two values when one is a multiple of the other. For example, \(1\text{cm} = 10\text{mm}.\) To convert \(\text{cm}\) to \(\text{mm}\), the multiplier is always 10.