Can someone help me identify the equation and identify one solution for this graph

How many solutions does the nonlinear system of equations graphed below have?

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv