Mathematics 0580 · IGCSE · Perpendicular lines

Perpendicular lines — practice question

The diagram displays the points $C(-1, 2)$ and $D(9, 7)$. A coordinate grid with $x$- and $y$-axes is shown, and the diagram is labelled NOT TO SCALE.
(main)[4]

Find the equation of the line that is perpendicular to $CD$ and passes through the point $(1, 3)$. Give your answer in the form $y = mx + c$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: Correct gradient obtained by using $\frac{7-2}{9-(-1)}$

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI