help please 1 question

Question

anonymous · Answer

Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = -1.

 f(x) = −one twelfth (x − 5)2 + 2

 f(x) = one twelfth (x − 5)2 + 2

 f(x) = −one twelfth (x + 5)2 + 2

 f(x) = one twelfth (x + 5)2 + 2

anonymous · Answer

@amistre64

amistre64 · Answer

a actually went over this same question earlier today

amistre64 · Answer

what are your thoughts on it so far?

amistre64 · Answer

there are a few methods to approach this, so what you know is more important than what i know

anonymous · Answer

um well i dont really have an idea on where to start with this..can you you give me a little more to work wit sry

amistre64 · Answer

parabolas have a defined structure, and the lessons/material in your course should cover these things.  if you have no idea what to do at the moment, then you might want to review your material.  if you had some idea about this i could help you iron out the rough spots.

anonymous · Answer

well i look at the lesson again but thx for try :)

amistre64 · Answer

do you know a vertex form of a parabola?  thats what the options are presented in

where does a vertex fit with regards to a focus and directrix?

how does the direction a parabola open effect the format?

amistre64 · Answer

are you able to draw a rough sketch and label the information that is provided?

amistre64 · Answer

stuff like this would be useful

anonymous · Answer

ok il look into the stuff you pointed out..thxman

amistre64 · Answer

http://openstudy.com/users/amistre64#/updates/5436a767e4b09f2026ed562c and this is the same question as yours that i covered earlier that would give you pointers.

anonymous · Answer

kk thx

amistre64 · Answer

yw