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The display shows in blue the straight line graph of the equation y = mx+c.

You can alter this graph by using the sliders to change the values of m and c.

Choose a red graph:

Now use the sliders to match the lines.

Software/Applets used on this page

JSXGraph
This page uses JSXGraph


JSXGraph is a cross-browser library for interactive geometry, function plotting, charting, and data visualization in a web browser. It is implemented completely in JavaScript, does not rely on any other library. It uses SVG and VML and is fully HTML5 compliant.

This question appears in the following syllabi:

SyllabusModuleSectionTopicExam Year
AQA GCSE (9-1) Foundation (UK)A: GraphsA9: Plotting Straight-Line GraphsStraight-Line Graphs-
CBSE IX (India)AlgebraPolynomialsConstant, linear, quadratic and cubic-
CBSE XI (India)Coordinate GeometryStraight LinesGeneral equation of a line-
CIE IGCSE (9-1) Maths (0626 UK)5 Co-ordinate GeometryB5.4 Equations of Straight LinesStraight-Line Graphs-
Edexcel GCSE (9-1) Foundation (UK)A: GraphsA9: Plotting Straight-Line GraphsStraight-Line Graphs-
GCSE Foundation (UK)AlgebraGraphsThe straight line graph-
GCSE Higher (UK)AlgebraGraphsThe straight line graph-
OCR GCSE (9-1) Foundation (UK)7: Graphs of Equations and Functions7.02a: Straight Line GraphsStraight-Line Graphs-
Universal (all site questions)GGraphsThe straight line graph-