Hi

Standard Form of an Equation of an Ellipse is  

where Pt(h,k) is the center with a and b determining the respective vertices distances from center.

x^2/9+y^2/16=1

Center(0,0)  Vertices: (3,0),(-3,0) and (0,4),(0,4)

foci distance from center along major axis: 

foci: (0,sqrt(7)),(0,-sqrt(7))



 

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