Ratio, proportion and rates of change: interpret the gradient of a straight line graph as a rate of change; recognise and interpret graphs that illustrate direct and inverse proportion(Pearson Edexcel GCSE)

Mastery Mind: Mathematics Revision · Oct 20, 2026 · 5m

A graph is more than a picture: its gradient can reveal a cyclist's speed, a tank's emptying rate or a price per kilogram. Learn to calculate and interpret rates with the correct units, then distinguish direct proportion from inverse proportion using the origin, constant quotients and constant products. [Download the complete JSON study guide](/home/ubuntu/study_guide/gradient_proportion_study_guide.json). Listen to this audio revision guide for Ratio, proportion and rates of change: interpret the gradient of a straight line graph as a rate of change; recognise and interpret graphs that…