(a)[2]
Sketch the graph of $y = 4 - 3x$ on the axes.
(b)[2]
Sketch the graph of $y = -x^2$ on the axes.
(c(i))[5]
Find the coordinates of the turning points on the graph of $y = 10 + 9x^2 - 2x^3$.
(c(ii))[3]
Determine whether each turning point is a maximum or a minimum, and show the method you used to decide.