Equations of other straight line graphs The equation of a straight line on a graph is made up of a \(y\) term, an \(x\) term and a number, and can be written in the form of \(y = mx + c\).

All the points on the vertical line below have an x-coordinate of \(7\), so you can say that the equation of the line is \(x = 7\). Graph forms All vertical line graphs have an equation of the form: ...