Question

Investigating Quadratics? :(

Answer 1

Derive the equation of the parabola with a focus at (2, −1) and a directrix of y = negative one half.
A f(x) = −(x + 2)2 − three fourths

B f(x) = (x + 2)2 + three fourths

C f(x) = −(x − 2)2 + three fourths

D f(x) = −(x − 2)2 − three fourths

Answer 2

Vertex form of a parabola is y = a(x - h)^2 + k where (h, k) is the vertex.

Answer 3

The answer is C.