Find the Vertex of the Parabola Associated with the Quadratic $$y = - x ^ { 2 } + 9 x + 7$$

question 47

Multiple Choice

Find the vertex of the parabola associated with the quadratic equation.
- $$y = - x ^ { 2 } + 9 x + 7$$

• A) \(( 9,7 )\)
• B) \(( - 9 , - 155 )\)
• C) \(\left( - \frac { 9 } { 2 } , - \frac { 215 } { 4 } \right)\)
• D) \(\left( \frac { 9 } { 2 } , \frac { 109 } { 4 } \right)\)

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