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TrynTrynJ
It is the line of symmetry of a parabola and divides a parabola into two equal halves that are reflections of each other about the line of symmetry. It intersects a parabola at its vertex. It is a vertical line with the equation of x = -b/2a.
christopherprufer
It is a vertical line with the equation of x = -b/2a.

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