Question 135156
(x-h)^2     (y-k)^2
_______  +   _____  = 1
   a^2        b^2

----------------------------------
If a^2 = 4 and b^2=9
the a = 2 and b =3
------------------------
Then the vertical axis of the ellipse has length 2*3=6
and the horizontal axis of the ellipse has length 2*2=4
---------------------------
In this case the vertical axis is the major axis
the horizontal axis is the minor axis.
---------------------------
If the numbers are switched the horizontal axis =6 is major
and the vertical axis =4 is minor.
========================================
The center in both cases is (h,k)
========================================
Cheers,
Stan H.