The path of a parabolic arch is described by the equation , where is the height of the arch in feet and is the horizontal distance in feet from a reference point. Which of the following statements best describes the axis of symmetry of the arch?
The axis of symmetry is the line , representing the maximum height of the arch.
The axis of symmetry is the line , representing the horizontal distance at the arch's peak.
The axis of symmetry is the line , representing the horizontal distance at which the arch reaches its maximum height.
The axis of symmetry is the line , representing the maximum height of the arch.
