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A circle is shown on the coordinate plane below. http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0802_07/image0034e849df3.gif What is the equation of this circle? x2 + (y + 1)2 = 4 x2 + (y – 1)2 = 2 x2 + (y + 1)2 = 2 x2 + (y – 1)2 = 4

Mathematics
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I think it's the first one

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Other answers:

is it the first choice? I'm just double checking
check again :)
why is it the last one?
wouldnt it be 2^2=4 so its the first one? Dont you have to add not subtract?
general form of equation is : (x-h)^2 + (y-k)^2 = r^2 can you tell whats the center (h, k) and radus r, from the figure ?
yeah radius you got it correct !!
yes, the center is 0,1 and the radius is 2
wait.... so which one is it?
1st or last?
center = (h, k) = (0, 1) (x-h)^2 + (y-k)^2 = r^2
plug in h and k values
(x-0)^2 + (y-1)^2 = 2^2 x^2 + (y-1)^2 = 4
so the first one?
does that help/make sense ?

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