What is the equation of a circle centered at (-3,1) with radius 7?

Question

asked Apr 17, 2019 18.9k views

1 Answer

Fahimeh Ahmadi · Answer 1 · 2019-04-20T22:12:59+0000

The standard form of a circle is
(x-h)^2+(y-k)^2=r^2

, where h and k are the coordinates of the center and r is the radius. We will fill in accordingly with what we have.
(x-(-3))^2+(y-1)^2=7^2

. Simplifying a bit we have
(x+3)^2+(y-1)^2=49

. That's the equation for your circle.