Question

The focus for this parabola is (-1,0).

x=(1/4)y^2

A. True
B. False

Answer 1

didn't you already do this one...

Answer 2

the last post i said...the focus width = 1/(4a) = 1/4*1/4 = 1

Answer 3

another way to check is the focus is always inside the parabola.
So if it opens up/right, the focus is above or right of vertex.
if it opens down/left, the focus is below or left of vertex

Answer 4

so this is true?

Answer 5

this open to the right, therefore the focus must be to the right of vertex.
Is (-1,0) to the right of (0,0) ?

Answer 6

no

Answer 7

good, that means (-1,0) is not the focus
from my earlier post you should already know that the focus of x=1/4y^2 is (1,0)