Help please

The center of a circle is at (-5 , 1) and it has a radius of 9. What is the equation of the circle?

A.(x-5)^2+(y+1)^2= 81

B.(x-5)^2+(y+1)^2= 3

C.(x+5)^2+(y-1)^2= 81

D.(x+5)^2+(y-1)^2= 3

5 answers

(x - a)^2 + (y-b)^2 = r^2
for circle of radius r and center at (a,b)

so this is c?

yes

thank you, Damon :)

You are welcome.

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