The given graph is observed that,

Find the vertex:

Because the parabola opens upward, the vertex is located at the minimum point of the parabola.it is located at (0,4).

Find axis of symmetry:

The axis of symmetry is the line that goes through the vertex and divides the parabola into congruent halves. It is located at x = 0.

Find y-intercept:

The y-intercept is the point where the graph intersects the y-axis. It is located at (0,1), so the y-intercept is 4.

The graph of the vertex is (0,4), the axis of symmetry is  x = 0 and y-intercept is 4.