Find the Vertex of the Graph of the Quadratic Function $$f ( x ) = - x ^ { 2 } + 9 x - 9$$

question 147

Multiple Choice

Find the vertex of the graph of the quadratic function.
- $$f ( x ) = - x ^ { 2 } + 9 x - 9$$

• A) \(( - 9 , - 171 )\)
• B) \(\left( - \frac { 9 } { 2 } , - \frac { 279 } { 4 } \right)\)
• C) \(( 9 , - 9 )\)
• D) \(\left( \frac { 9 } { 2 } , \frac { 45 } { 4 } \right)\)

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