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An ellipse has foci (0, ±4) and minor axis of length 6. Its equation is
Ax²/25 + y²/9 = 1
Bx²/16 + y²/9 = 1
Cx²/9 + y²/16 = 1
Dx²/9 + y²/25 = 1
Answer & Solution
Correct answer: D. x²/9 + y²/25 = 1
b = 3 and c = 4 give a² = 9 + 16 = 25, and foci on the y-axis put a² under y².
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