Find the vertex of the graph of the quadratic function and determine whether it's an absolute maximum or an absolute minimum: y = x2 + 18x + 83.
 Question 13 options:
 A) 
 Vertex: (9,–2); maximum
 B) 
 Vertex: (–9,2); minimum
 C) 
 Vertex: (9,– 2); minimum
 D) 
 Vertex: (–9,2); maximum