What is the vertex of the graph shown below? write your answer in the form (x, y)

The vertex of a parabola is the point where the parabola crosses its axis of symmetry.
 For this case we have that the vertex of the parabola is the point:
 (x, y) = (1, 4)
 Equivalently:
 x = 1
 y = 4
 
 the vertex of the graph shown below is 
 (x, y) = (1, 4)

In this problem it decreased 20%