Make sure you are confident with substituting values into expressions and solving equations to understand how to plot straight line graphs. Straight line graphs. All straight line graphs ...

If an equation can be rearranged into the form \(y = mx + c\), then its graph will be a straight line. In the above: \(x + y = 3\) can be rearranged as \(y = 3 - x\) (which can be re-written as ...