Remember that to find the equation of a straight line you need to know its gradient and a point on the line. In some instances you are told the value of the gradient, however there are times where you ...

Equations of parallel lines The equation of a straight line is 𝑦 = 𝑚𝑥 + 𝑐 where 𝑦 is the subject of the equation, 𝑚 is the gradient , and 𝑐 is the 𝑦-intercept .