Determine If the Graph of the Function Is Concave Up $f ( x ) = - 3 x ^ { 2 } - 3 x - 9$

Multiple Choice

Determine if the graph of the function is concave up or concave down
- $f ( x ) = - 3 x ^ { 2 } - 3 x - 9$

A) Concave up
B) Concave down