Graph the Function $f ( x ) = x ^ { 2 } + 4 x - 7$

question 209

Multiple Choice

Graph the function. Identify the vertex, x-intercepts, and the equation for the axis of symmetry.
- $f ( x ) = x ^ { 2 } + 4 x - 7$

• A) vertex: \(( - 2,3 )\) \(\mathrm { x }\)-intercepts: none axis of symmetry: \(x = - 2\)
• B) vertex: \(( 4,0 )\) \(\mathrm { x }\)-intercept: \(( 4,0 )\) axis of symmetry: \(\mathrm { x } = 4\)
• C) vertex: \(\left( - \frac { 1 } { 2 } , - 12 \frac { 1 } { 4 } \right)\) \(x\)-intercepts: \(( - 4,0 )\) and \(( 3,0 )\) axis of symmetry: \(x = - \frac { 1 } { 2 }\)
• D) vertex: \(( - 2 , - 11 )\) \(x\)-intercepts: \(( - 2 \pm \sqrt { 11 } , 0 )\) axis of symmetry: \(x = - 2\)

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