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What proportion means

What proportion means

The symbol y∝xy \propto xy∝x means yyy is proportional to xxx. In GCSE questions, you usually replace ∝\propto∝ with an equation using a constant kkk.

Direct and Inverse Proportion Lesson

  1. GCSE
  2. /Maths
  3. /Direct and Inverse Proportion

Step-by-step lessons covering OCR GCSE Maths Direct and Inverse Proportion for Foundation and Higher tier. Each lesson works through exam-style questions in the written papers format. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.

Lessons

SurdsBoundsDirect and Inverse ProportionQuadratic FormulaFactorising Harder QuadraticsAlgebraic FractionsRearranging Harder FormulaeInverse and Composite FunctionsIterationFinding the Area of Any TriangleThe Sine RuleThe Cosine RuleCongruent Triangles3d Pythagoras and TrigonometryHistogramsConditional Probability