Question

Write the standard form of the equation of the circle that passes through the point (0, 1) with its center at the origin.
a. x^2 + y^2 = -1
b. x^2 + y^2 = 1
c. x^2 + (y - 1)^2 = 1
d. x^2 + (y = 1)2 = 1

Answer 1

second one

Answer 2

center is (0,0) radius is 1 aka the "unit circle"