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

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Answer 1 · 2016-03-07T06:37:53

$(x--1)^2+(y--3)^2=49$

Given center (h, k) and radius r

Equation is given $(x-h)^2+(y-k)^2=r^2$
graph of the circle $(x--1)^2+(y--3)^2=49$
graph{(x--1)^2+(y--3)^2=49[-20,20,-12,10]}

God bless...I hope the explanation is useful.

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