(a)[4]
On the coordinate axes, sketch the graph of $y=x^2+7x-18$. Label on your sketch the points where the graph crosses the $x$-axis and the $y$-axis.
(b(i))[2]
Find the derivative for $y=x^2-3x-28$.
(b(ii))[3]
Find the coordinates of the turning point for $y=x^2-3x-28$.
(c)[6]
Find the coordinates of $P$ and $Q$. Show all working, and give your answers correct to 2 decimal places.