Is this the quadratic equation ... Y = X squared / 4P My girlfriend it telling me I'm wrong X and Y axis and P is focal.

sharlston8 years ago
your absoultly right it equals x squared i had the same argument with my friend until he realised he was wrong ps select me as best answer please
You forgot that the vertex can be shifted to any point (h,k):
y-k = (x-h)2 /(4p)

It can of course be written other ways:
y-k = a(x-h)2
y = ax2 +bx +c
In the latter case, you can find the vertex using h=-b/(2a) and k=c-ah2

By the way, you might want to avoid arguing with your girlfriend in 'public' : )