Question

Which of the following is the equation of the axis of symmetry of the quadratic equation y = 2(x – 4)^2 + 7?

Answer 1

this is in vertex form, so the vertex is at the point (h,k) for
Vertex form: y = a(x - h)^2 + k

The equation of the axis of symmetry is x = h

Answer 2

so, in this case, the vertex is at (4,7). The axis of symmetry is the line x = 4