Question

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

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

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

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

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

Answer 1

general eqn for circle center at (a,b) and radius r

(x-a)^2 + (y-b)^2 = r^2

so which do u think is the right ans?

Answer 2

C?

Answer 3

correct - good job! :)

Answer 4

thank you!!