Question

How do i find the Directrix if I know the vertex and focus?
Like for this problem :
Vertex: (0,1)
Focus: (0,5)

Answer 1

@TheSmartOne plz?

Answer 2

the focus and directrix are "equidistant" to the vertex, thus

Answer 3

oh so they are the same?

Answer 4

eh? equiDISTANTs the same distance from the vertex to the focus as it's to the directrix

Answer 5

i would say below the 1

Answer 6

yeap... notice the distance from the vertex to the focus point, is 4 units
so the directrix will also be 4 units, but yes, below 1
or in the opposite direction of the focus