Question

Find the center of the circle whose equation is x² + y² = 4.

A.(0, 0)
B.(1, 1)
C.(2, 2)

Answer 1

The answer is A! This is because the formula is (x-h)^2 + (y-k)^2 = r^2.
Because there is no value, you can see that h and k are zero. This means that the center, (h,k) is (0,0).