Question 975560
{{{x=4y^4-5y^2}}}
x as a function of y.  Horizontal axis of symmetry, much like a parabola, but it is not really a parabola.



{{{x^2+y^2+y=0}}}
Complete The Square for y.
{{{x^2+y^2+y+1/4=1/4}}}
{{{x^2+(y+1/2)^2=1/4}}}
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Center is (0,-1/2) and radius is {{{1/2}}}.