Hi Anna.
Didn't have the time to actually answer the question that you wanted answering but i thought i'd direct you to a very good website that would give you a re-cap about Parabolas if that is ok. It is: Parabolas Lessons 1 to 4 by Jack Sarfaty.
You should find Jack Sarfaty's information about Parabolas very useful.
Find the equation of the parabola with directix y=3 and focus (5,7)?
1 answer