Question

Which of the following is thegraph of(x - 1)2 + (y - 2)2 = 4 ?

Answer 1

Note that in a standard equation of a circle :

`(x-h)^2+(y-k)^2=r^2`

The center is at (h, k)

From the problem, the given equation is :

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

The center is at (1, 2)

The only option that has a circle centered at (1, 2) is A

The answer is A.