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 ...

2 \) or \(y = 3x + 14\). Vertical lines have equations of the form \(x = k\). Horizontal lines have equations of the form \(y = c\). Draw the graph of \(x = 3\). Mark some points on a grid which ...