The term 'axis of symmetry' would be a line that reflects a graph into two matching halves.
Work Step by Step
Page 534 states that the fold or line that divides the parabola into two matching halves is the axis of symmetry.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.