Question 753072: Use the information provided to write the standard form equation [(x^2/b^2)+ (y^2/a^2)=1] of the ellipse:
vertices: (7,-4), (-13,-4)
co-vertices: (-3,4), (-3,-12)
Answer by josgarithmetic(39620)   (Show Source):
You can put this solution on YOUR website! vertices: (7,-4), (-13,-4)
The middle point is at ((7-13)/2, -4)=(-3,-4)
co-vertices: (-3,4), (-3,-12)
The middle point is at (-3, (4-12)/2)=(-3,-4)
The model standard form you stated is incomplete and should be instead,
 and know that the center is (h,k).
You main vertex point show a length for 2a=20, so a=10.
Your "covertex" points show a length of 2b=16, so b=8.
Put in the pieces but watch the signs for center...
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