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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
 one year ago
 one year ago
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
 one year ago
 one year ago

This Question is Closed

Sunshine447Best ResponseYou've already chosen the best response.1
I think it's the first one
 one year ago

Sunshine447Best ResponseYou've already chosen the best response.1
is it the first choice? I'm just double checking
 one year ago

Sunshine447Best ResponseYou've already chosen the best response.1
why is it the last one?
 one year ago

Sunshine447Best ResponseYou've already chosen the best response.1
wouldnt it be 2^2=4 so its the first one? Dont you have to add not subtract?
 one year ago

ganeshie8Best ResponseYou've already chosen the best response.0
general form of equation is : (xh)^2 + (yk)^2 = r^2 can you tell whats the center (h, k) and radus r, from the figure ?
 one year ago

ganeshie8Best ResponseYou've already chosen the best response.0
yeah radius you got it correct !!
 one year ago

Sunshine447Best ResponseYou've already chosen the best response.1
yes, the center is 0,1 and the radius is 2
 one year ago

Sunshine447Best ResponseYou've already chosen the best response.1
wait.... so which one is it?
 one year ago

ganeshie8Best ResponseYou've already chosen the best response.0
center = (h, k) = (0, 1) (xh)^2 + (yk)^2 = r^2
 one year ago

ganeshie8Best ResponseYou've already chosen the best response.0
plug in h and k values
 one year ago

ganeshie8Best ResponseYou've already chosen the best response.0
(x0)^2 + (y1)^2 = 2^2 x^2 + (y1)^2 = 4
 one year ago

ganeshie8Best ResponseYou've already chosen the best response.0
does that help/make sense ?
 one year ago
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