Can someone tell me which equation can be used to find x?

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two