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5.2.1 Direct Proportion — OCR Mathematics J560 | GradeGen.AI
Mathematics
Ratio, Proportion and Rates Of Change
Proportionality
Direct Proportion
Direct Proportion
OCR GCSE Mathematics (J560) — Ratio, Proportion and Rates Of Change
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
9 key terms
2
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.
Formal Linear Direct Proportion
8 key terms
3
Direct Proportion with Powers and Roots
5 key terms
