Sangeetha Pulapaka

Step 1: Remember what is a vertex of a parabola.

An axis of symmetry is the line that divides the parabola into two congruent halves, and also passes through its vertex.

Step 2: Remember how to plot  a parabola

Plot the parabola y = x^{2} - 2x

The axis of symmetry is at x = 1.