Question

Using a directrix of y = -3 and a focus of (2, 1), what quadratic function is created?

Answer 1

f(x) = one eighth (x - 2)2 - 1
f(x) = -one eighth (x + 2)2 - 1
f(x) = one half (x - 2)2 + 1
f(x) = -one half (x + 2)2 - 1

Answer 2

@freckles
@Hero
@wio
@Zarkon

Answer 3

@mathstudent55