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Give the equation for a circle with the given center and radius. Center at (2, -9), radius = 3

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2 votes
The correct equation is (x-2)^2+(y+9)=9
User Leigh Mathieson
by
8.2k points
5 votes

In standard form, the equation is
(x-2)^2+(y+9)^2=9, where we have plugged
(h,k,r)=(2,-9,3) into the standard-form equation
(x-h)^2+(y-k)^2=r^2. The center of this general form has coordinates
(h,k), and the radius is
r.

User Rob Osborne
by
8.7k points

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