Key Stage 4 (GCSE) · Years 10-11 · Ratio, proportion and rates of change
R13understand that X is inversely proportional to Y is equivalent to X is proportional to 1/Y; construct and interpret equations that describe direct and inverse proportion
GCSE subject content
GCSE specifications in mathematics should require students to understand that X is inversely proportional to Y is equivalent to X is proportional to 1/Y; construct and interpret equations that describe direct and inverse proportion
Tier: This item is set in underlined type: assessed for all students (part of the full Foundation tier). “construct and” is bold (Higher tier only).
Source: Department for Education, GCSE mathematics: subject content and assessment objectives. Crown copyright information reproduced under the Open Government Licence v3.0.
uk-gcse-ma-r-13. The DfE numbers this item 13 within Ratio, proportion and rates of change; the R13 form follows the awarding bodies' convention.Relevant worksheets
These resources support parts of the requirement. They are not presented as a complete assessment of every clause.
Related teaching units
These existing units provide relevant lesson material. A dedicated unit may still be needed where the requirement is broader.