Mathematics GCSE
Direct proportion and the constant of proportionality
What Direct proportion and the constant of proportionality means in Mathematics GCSE, as defined for AQA.
Definition of Direct proportion and the constant of proportionality
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Reference: AQA
If y is proportional to x with y : x = 3 : 5, then y = (3/5)x, where the constant of proportionality is the gradient of the line.
Topics that use Direct proportion and the constant of proportionality
- Ratio, proportion and rates of change (AQA GCSE)
Related terms
- Algebraic rearrangement of compound-unit formulae
- Checking the reasonableness
- Chord versus tangent
- Comparing quantities of the same kind
- compound interest
- Compound Measure
- compound unit
- constant of proportionality
Using Direct proportion and the constant of proportionality in the exam
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