$(-1,0)$ is a point that lies on the graph of the unit circle.
Work Step by Step
A unit circle is a circle with a radius of one, with a center on the origin (0,0). Therefore the point (-1,0), is found on the unit circle. Because this is a simple example, there is no need to substitute it into the equation of a circle to find whether the radius is equal to one, because -1 squared added to 0 squared is 1, the radius of the unit circle.