Eccentricity-directrix approach Find an equation of the following curves, assuming the center is at the origin. Sketch a graph labeling the vertices, foci, asymptotes, and directrices. Use a graphing utility to check your work.An ellipse with vertices (0, ±9) and eccentricity

Solution 52EStep 1:We know the equation of ellipse Has foci(h,Directrix y=