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 ...

The graphs above, \(y = 2x + 1\) and \(y = 2x ... Find the equation of a straight line that is perpendicular to \(y = 2x + 1\). The gradient of \(y = 2x + 1\) is 2. The reciprocal of 2 is ...