please help the parabola of a locus (1 Viewer)

[Jkitty]

Hello
I have a question
5.g. ex. 11.4
Find the equation of the parabola with coordinates of the vertex (0,0) and equation of the axis x=0 and passing through the point (-8,2)
thank you

 

[Carrotsticks]

The standard equation of that parabola is x^2 =4ay.

Substitute in that coordinate to find the value of a