Question 876349
Center is at (4,3) with {{{a=(7-1)/2=3}}}.  Not sure about what you say, minor axis of 12.  This seems to be {{{b=6}}}.


Major axis is horizontal, so the subtraction would go with with the y term.
{{{(x-4)^2/3^2-(y-3)^2/6^2=1}}}.