Graph of a quadratic function y = ax² + bx + c showing a downward-opening parabola with vertex at (0, -1).
Graph of a parabola opening downward with vertex at (0, -1) and x-intercepts at approximately (-1.5, 0) and (1.5, 0). The graph is labeled with points at (-2, -3), (-1, -2), (0, -1), (1, -2), and (2, -3).