write and equation based on the given information: *ELLIPSE*  center=origin   v=(0,-7)   cv=(4,0)

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x^2 + y^2 = r^21 = (x^2)/49 + (y^2)/16I think this is right, but you may need to switch it so that the y^2 is being divided by 49, and x^2 is being divided by 16.  I hope this helps!