Plotting straight line graphs

To plot a graph from its equation

• Re-arrange equations into form y = mx + c
•  Pick 3 sensible points for x, including 0, then solve for y.
• Plot points on grid. 
• Join with  a straight line that goes through the y axis.
• Graph will cut the y axis at (0,c) and have gradient m.

Example

Plot the graph y - 2x = 4

© Alexander Forrest