Question

Help Please!! Find an equation of a parabola with a vertex at the origin and directrix y = –3.5

Answer 1

@Hero can you help

Answer 2

@campbell_st can you help

Answer 3

ok... so the standard vertex form I use is

\[(x - h)^2 = 4a (y - k)\]

the vertex is (h, k) and a is the focal length

in you're question, the vertex is above the directrix so the parabola is concave up...

so the distance from the directrix to the vertex is the focal length a

any ideas on what value a has..?

Answer 4

14?

Answer 5

hello @campbell_st

Answer 6

can you help @mertsj