Question

Which is the directrix of a parabola with equation x^2=4y??

A. y=1
B. x=-1
C. y=-1
D. x=1

Answer 1

y=−1 cause you would,Graph the parabola using its properties and the selected points.

Direction: Opens Up

Vertex: (0,0)

Focus: (0,1)

Axis of Symmetry: x=0

Directrix: y=−1 so that the answer

Answer 2

Its C. y = -1