Question 1136722
{{{x-h=a(y-k)^2}}}, horizontal symmetry axis, vertex (h,k)


{{{x=ay^2}}}, vertex is (0,0).


{{{a=x/y^2}}}


{{{a=-2/25}}}, using the given point on the parabola.


{{{highlight(x=-(2/25)y^2)}}}