Question

The question is in the image. Please help me.

Answer 1

Explanation:

The standard form of a circle is

`(x-h)^2+(y-k)^2=r^2` where h and k are the center of the circle and r is the radius. Our center is located at (0, 1), so h = 0 and k = 1. Going from the center straight up of down we have to move 2 units to get to a point on the outside of the circle, so r = 2. Filling in our equation:

`(x-0)^2+(y-1)^2=2^2` which simplifies a bit to

`x^2+(y-1)^2=4`