Question 857892
You are correct, {{{b=1}}} .
Also {{{a}}} is the distance from vertex (2, 1/2) to center (2,-1),
{{{a=1/2-(-1)=3/2}}}
{{{x^2/1^2+y^2/(3/2)^2=1}}} or {{{x^2/1+y^2/(9/4)=1}}} would be the standard form,
but I think it looks prettier as
{{{x^2+4y^2/9=1}}} .