Between e, and f how do I know whether to use y= a(x-h)^2+k form, or ax^2 +bx +c form? And how do I work it out?
And how do I work out this one step by step?
In both cases you know the coordinates of the vertex and the coordinates of one additional point. I'm going to do f so you can try to do e:
You know: V(2, 2) and P(0, 6). Plug in these coordinates:
. Thus your equation becomes: