Algebra-1

Question Analysis
This question tests the student's ability to use symmetry to find the abscissa of the vertex of a parabola. The axis of symmetry is the vertical line passing through the vertex, and it is equidistant from any two symmetric points on the parabola.

Key Concept Explanation
For a parabola, if two points and are symmetric about the axis of symmetry, the axis of symmetry is given by . This is also the abscissa of the vertex.

Step-by-step Solution
1. Identify...