Question

please help !

Answer 1

@SolomonZelman

Answer 2

oh yay ! math male!

Answer 3

Hello, Plohrr!
Glad to "see" you!
Hey: know that the vertex of a parabola is exactly half way between the focus and the directrix?

Answer 4

yes...

Answer 5

Does it make sense to you that if the directrix is horizontal, the graph of this parabola/quadratic function is vertical?
I'm gonna make a very quick sketch of this situation; we can improve on the sketch as wel go along.

Answer 6

ok

Answer 7

Oh, shoot. I had the beginnings of a graph and then lost it. Real quick, another one:

Answer 8

..