Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to ...

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 ...

Question The following graph shows the car journey from Chelsea’s house to her mother’s house. Estimate the velocity of the car at t = 6.5 s. The tangent has been drawn for you.