6.2 Straight-Line Graphs: y = mx + c

About this lesson

Draw straight-line graphs, understand what m and c mean in y = mx + c, find the equation of a line, and solve simultaneous equations using graphs. You will learn: • Drawing a line from a table of values (with a safety-check point) • m is the gradient and c is the y-intercept • Rearranging equations into y = mx + c • Horizontal and vertical lines: y = 3 and x = −2 • Finding the equation from a gradient and a point, or from two points • Sketching a line quickly from its intercepts • Solving simultaneous equations with graphs • Practice questions with full answers This is lesson 2 of 7 in Chapter 6: Graphs 6.1 Line segments 6.2 Straight-line graphs (this lesson) 6.3 Parallel and perpendicular lines 6.4 Travel graphs 6.5 Quadratic graphs 6.6 Gradient of a curve 6.7 Graphical solutions of equations © 2026 teachly.lk. All rights reserved. This lesson and its animations are original teachly.lk content. Please do not copy, download, re-upload or share it outside teachly.lk without permission. teachly.lk is an independent learning resource and is not affiliated with Cambridge Assessment International Education.

Presented by: teachly.lk