Question

Circle P has a radius of 8 units with center P at (2, -1). Which equation defines circle P?

(x + 2)2 + (y – 1)2 = 64

(x – 2)2 + (y + 1)2 = 64

(x – 2)2 + (y + 1)2 = 8

(x + 2)2 + (y – 1)2 = 8

Answer 1

The form is (x - h)^2 + (y - k)^2 = r^2

Answer 2

I don't get it, switch would it be?

Answer 3

Basically, r stand for radius. So if the radius is 8, where would gthe radius go and what would happen to it based on the form?

Answer 4

Then switch the signs of the center and place them where h and k are. h with the x and k with the y

Answer 5

So would it be (x – 2)2 + (y + 1)2 = 8?

Answer 6

Remember, it's r^2 not r. It would be (x – 2)^2 + (y + 1)^2 = 64