HELP! Which of the following equations represents an ellipse having a major axis of length 18 and foci located at (4,7) and (4,11)?

sooooo i dont know the answer BUT i can eliminate some ... i graphed them and C and D do not look like their foci would be (4,7) and (4,11)

Question

HELP! Which of the following equations represents an ellipse having a major axis of length 18 and foci located at (4,7) and (4,11)?


sooooo i dont know the answer BUT i can eliminate some ... i graphed them and C and D do not look like their foci would be (4,7) and (4,11)

anonymous · Answer

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vishweshshrimali5 · Answer

Ok now can you tell me how do you get the focii, length of major and minor axis of this ellipse:

$\large{\cfrac{(x-x_{0})^2}{a^2} + \cfrac{(y-y_{0})^2}{b^2} = 1}$

tkhunny · Answer

Who cares what it "looks like"?  Prove it!

The foci are oriented in such a way as to suggest the Major Axis is in the y-direction.

A and D are no good.

The foci themselves suggest the center is (4,9)

C and D are no good.

Well, that doesn't leave much.

You don't have to stew over these.  Just walk through it.  Use what is given and draw on your knowledge.

anonymous · Answer

mmmmhhh ok thennn ...