Determine if the parabola opens up or down.
Vertex: ; Axis of symmetry: ; Domain: ; Range:
Vertex: (0,21); Axis of symmetry: x=0; Domain: (−∞,∞); Range:
Vertex: ; Axis of symmetry: ; Domain: (−∞,∞); Range:[−21,∞)
Vertex: (0,−21); Axis of symmetry: x=−1; Domain: (−∞,∞); Range:
Verified step by step guidance