+129852 Vertex = (0,0)
Focus = (-6,0)
The focus is to the left of the vertex.....this parabola will open to the left
We have the form
-4px = y^2
p = distance from focus to vertex = sqrt [ (-6-0)^2 + (0 - 0)%2 ] = sqrt (36) = 6
The equation is
-4 (6)x = y^2
-24x = y^2 which also can be writtten
x = (-1/24)y^2
See the graph here : https://www.desmos.com/calculator/qgqpf58id8
