What is the equation of an ellipse
with center at the origin, a vertex at (0,6) and a focus at (
,0)?
(A) 
(B) 
(C) 
(D) 
What is the equation of an ellipse
with center at the origin, a vertex at (0,6) and a focus at (,0)?
(A)
(B)
(C)
(D)
Because the vertex is at (0,6), we know that a2 has to be the denominator of y and b2 has to be the denominator or x. In order to find b:
c2=a2-b2
(3√3)2=62-b2
27 = 36 - b2
b2=9
b = 3
Thus, we have 