(a)[4]
Find the coordinates of $C$ and of $D$. You may use the grid to assist you.
(b(i))[2]
Determine the midpoint of $PQ$.
(b(ii))[3]
Determine the length of $PQ$.
(b(iii))[2]
Find the gradient for $PQ$.
(b(iv))[3]
Find the equation of the line that is parallel to $PQ$ and crosses the $x$-axis at $x = 2$.