Question

complete the sentence below.
the vertical line passing through the vertex of a parabola is called the_________
the vertical line passing through the vertex of a parabola is called the

Explanation:

A parabola has a vertex. The vertical line passing through this vertex is a key feature in the study of parabolas. By definition, this line is known as the axis of symmetry. It divides the parabola into two mirror - image halves.

Answer:

axis of symmetry