(a(i))[1]
Work out the gradient of this line.
(a(ii))[1]
Find the co-ordinates of the point where the line meets the $y$-axis.
(b(i))[3]
Determine the equation of line $L$.
(b(ii))[3]
Find the equation of the line perpendicular to line $L$ that goes through $(9, 3)$.
(c(i))[3]
Calculate the distance between $A$ and $B$.
(c(ii))[2]
Find the co-ordinates of the midpoint between $A$ and $B$.