Medium
What is the center of the ellipse (x−4)21+(y+9)29=1\frac{(x-4)^2}{1}+\frac{(y+9)^2}{9}=11(x−4)2+9(y+9)2=1 ?
(4,−9)(4,-9)(4,−9)
(−4,9)(-4,9)(−4,9)
(−9,4)(-9,4)(−9,4)
(+9,+4)(+9,+4)(+9,+4)
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