Algebra 2 Ellipses Writing the equation

BrandyJo

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May 6, 2012
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Algebra 2 Ellipse problem help needed.

If you are given the following info, how do you write an equation of the ellipse.

The center of the ellipse is at (0,0)
Vertex (0,7)
Focus (0,3)

The equation is:

x2/b2 + y2/a2 = 1

where b= value of co vertex (b,0)
a= value of vertex (0,a)
c= value of focus (0,c)

In this problem how do I solve for b knowing only the Vertex and Focus?
 
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