Graph Parabolas with Vertices at the Origin
Find the Focus $$x ^ { 2 } = - 16 y$$

Multiple Choice

Graph Parabolas with Vertices at the Origin
Find the focus and directrix of the parabola with the given equation.
- $$x ^ { 2 } = - 16 y$$

A) focus: $( 0 , - 4 )$
directrix: $y = 4$
B) focus: $( - 8,0 )$
directrix: $x = 4$
C) focus: $( 0 , - 4 )$
directrix: $y = - 4$
D) focus: $( 0,4 )$
directrix: $y = - 4$