More complex problems involving direct proportionality

• Young Digital Planet
• Key Stage 4
• Mathematics
• XII. Ratio and proportion
• 67. Direct proportion

• Exam Specifications
• Key Stage 4
• AQA GCSE Mathematics A (4301)
• I. Number and algebra
• Equations, formulae and identities
• Direct and inverse proportion
• set up and use equations to solve word and other problems involving direct proportion or inverse proportion and relate algebraic solutions to graphical representation of the equations

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