Identify the Vertex of the Parabola $y = x ^ { 2 } - 18 x + 85$

Multiple Choice

Identify the vertex of the parabola.
- $y = x ^ { 2 } - 18 x + 85$

A) (0, 9)
B) (4, 9)
C) (4, 0)
D) (9, 4)