Question 751197
The other focus is (0,-3) and the value of c=3, the focal distance.  As described with the center point and the foci, the major axis vertical.  As given, then that "co-vertex" must be on the semi-minor axis and represents here, the value for b.  b=2.  


You have b and c.  Now you can determine a.  If you understand these values as related to the graph, you will find a triangle, right triangle with legs 3 and 2, and hypotenuse a.  {{{a^2=3^2+2^2}}}, so what is a?


Your standard form equation is based on {{{(1/a^2)y^2+(1/b^2)x^2=1}}}