Question

Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = -1.

Answer 1

@dan815

Answer 2

@nincompoop

Answer 3

Can someone please help me with this I don't understand much about parabolas past the fact that they are basically exponential curves

Answer 4

@razorghost

Answer 5

first of all parabola is a second degree polynomial, not an exponential curve

Answer 6

Okay

Answer 7

@perl there is a program that moves the mouse...

Answer 8

vertex of parabola lies exactly halfway between directrix and focus : (5-1)/2 = 4/2 = 2 :