Question 1018987
Description would be parabola with vertex at Origin, and opening toward the right, and with points  (6,-4) and (6,4).


{{{x=ay^2}}}, and you want to find the POSITIVE number, a.


{{{a=x/y^2}}}
Substitute either point,
{{{a=6/16}}}
{{{a=3/8}}}
-
{{{highlight(x=(3/8)y^2)}}}