Last parabola question of the night :)
Find the equation
Focus at (-3, 4); directrix is the line y = 2

Question

Last parabola question of the night :)
Find the equation
Focus at (-3, 4); directrix is the line y = 2

sleepyjess · Answer

I think once I find the vertex, I'll be fine, but I'm not sure how to find the vertex...

sleepyjess · Answer

@amistre64 , wanna help on one more? :P

amistre64 · Answer

where does the vertex usually go?

sleepyjess · Answer

I know it's between the focus and directrix

amistre64 · Answer

then 0 one of them out ...

amistre64 · Answer

if y=2, then y-2 = 2-2

subtract 2 from all the y parts

sleepyjess · Answer

so, (3, 2)?

sleepyjess · Answer

*-3

amistre64 · Answer

Focus at (-3, 4); directrix is the line y = 2
                   -2                                     -2
              -----                                 -----
               -3,0                                        0

so, we have a vertex that is between -3 and 0 (in this adjustment, just add back the 2 to move it back)

amistre64 · Answer

ack ... i cant add worth nothing tonight 

-3,2 and y=0

amistre64 · Answer

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