Question

Find an equation for the parabola that has its vertex at the origin and satisfies the given condition.
Focus F

0, −
1
2

Answer 1

Focus at (0,-12) ??
if so then -12 = 1/4a
where y = a(x)^2

Answer 2

0, -1/2

sorry about that

Answer 3

ok
-1/2 = 1/(4a)
where y=ax^2