Which equation represents the axis of symmetry of the graph of the equation y equals x2-6x 5?

Assume the expression is:

y = x² - 6x + 5

Complete the squares to get:

y = x² - 6x + 9 + 5 - 9

= (x - 3)² - 4

By the vertex form:

y = a(x - h)² + k where x = h is the axis of symmetry

x = 3 is the axis of symmetry.