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Direct Proportion — OCR GCSE Maths J560
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Mathematics
OCR GCSE Mathematics
Ratio, Proportion and Rates Of Change
Proportionality
Direct Proportion
OCR GCSE Mathematics · J560
Direct Proportion
What you need to know
Solve simple problems involving direct proportion, including algebraic proportions, ratio equality, and currency conversion.
Solve formal direct proportion problems where
y
∝
x
y \propto x
y
∝
x
.
Recognise that
y
=
k
x
y = kx
y
implies
is proportional to
.
Revision notes
1
Simple Direct Proportion and Currency
5 key terms
2
Formal Linear Direct Proportion
4 key terms
3
Direct Proportion with Powers and Roots
5 key terms
Practise with past papers
Key terms & definitions
Previous topic: Ratio Calculations
Ratio Problems
Next subtopic
Inverse Proportion
=
k
x
y
y
y
x
x
x
Formulate and solve equations involving a quantity directly proportional to a power or root of another quantity.
