Write an equation of a parabola that opens to the left, has a vertex at the origin, and a focus at (–4, 0).

Step-by-step explanation:

we know that

The standard equation of a horizontal parabola is equal to  

where

(h,k) is the vertex

(h+p,k) is the focus

In this problem we have

(h,k)=(0,0) ----> vertex at origin

(h+p,k)=(-4,0)

so

h+p=-4

p=-4

substitute the values

answer: no

step-by-step explanation: because the big angle will spread away the 2 side that it is on and make the opposite side even longer.