Find the standard form of the equation of the ellipse and give the location of its foci.
Center at (-1, 1)
A. 
+ 
= 1
foci at (-1 + 3
, 1) and (-1 - 3
, 1)
B. 
+ 
= 1
foci at (- 3
, 1) and (3
, 1)
C. 
+ 
= 1
foci at (-1 + 3
, -1) and (-1 - 3
, -1)
D. 
+ 
= 1
foci at (1 + 3
, -1) and (1 - 3
, -1)
Answer: A
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