Cambridge IGCSE Mathematics · Syllabus 0580 · Coordinate Geometry
Drawing Linear Graphs
What is Drawing Linear Graphs?
The process of converting a linear equation into an accurately ruled straight line on a coordinate grid, by tabulating at least two correct points and plotting them to within half of the smallest square, or by finding the two axis intercepts. A linear equation is one in which x and y appear only to the first power, so its graph is always a straight line, and two correct points are enough to determine it. On the Core route the equation is given in the form y = mx + c, or a table of values is supplied; the Extended route may be given any linear form, such as 3x + 2y = 5, and must rearrange first. The vertical line x = k is the one straight line that cannot be written in the form y = mx + c.
This definition is part of the Coordinate Geometry chapter in Cambridge IGCSE Mathematics.