Direct proportionality

Key term for OCR GCSE Mathematics, used in Graph Interpretation.

Definition

A linear relationship where two variables increase at the same constant rate, and the graph passes through the origin (0,0).

Exam Context

Direct proportionality appears in OCR GCSE Mathematics revision content for Graphs of Equations and Functions, especially Graph Interpretation and Gradients and Rates of Change.

Graphs of Equations and Functions Graph Interpretation Gradients and Rates of Change

Found in Revision Notes

Graphs of Equations and Functions

Linear Gradients and Constant Rates of Change

Graph Interpretation • Gradients and Rates of Change

Revise note

Related Key Terms

Gradient Horizontal change Independent variable Linear relationship

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