Mathematics A-Level
proportionality graphs
What proportionality graphs means in Mathematics A-Level, as defined for WJEC.
Definition of proportionality graphs
Check what you remember
Read the wording for your board, then hide it and explain proportionality graphs in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
Direct proportion gives a straight line through the origin, while inverse proportion gives a rectangular hyperbola with the coordinate axes as asymptotes.
Topics that use proportionality graphs
- Algebra and Functions (AS Unit 1: Pure Mathematics A) (WJEC A-Level)
Related terms
- algebraic division
- Asymptotes
- boundary curves
- Completing the square
- conjunction
- critical values
- curve sketching
- dashed and solid lines
Using proportionality graphs in the exam
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