GCSE Edexcel Straight line graphs - Edexcel Parallel and perpendicular lines Graphs show the relationship between two variables and are often seen in newspapers and the media. People who work in ...

GCSE Eduqas Straight line graphs - Eduqas Parallel and perpendicular lines y = mx + c is an important real-life equation. The gradient, m, represents rate of change (eg, cost per concert ticket ...