Find the vertex and axis of symmetry of the graph of the function.
-$$f ( x ) = x ^ { 2 } + 8 x + 20$$
A)vertex: (-4, -4); x = -4
B)vertex: (-4, 4); x = -4
C)vertex: (0, 4); x = 0
D)vertex: (4, 0); x = 4

Question

Quizplus · Accepted Answer

The vertex of a parabola in the form f(x) = a(x - h)^2 + k is (h, k). In this case, h = -4 and k = 4, so the vertex is (-4, 4). The axis of symmetry is a vertical line passing through the vertex, so the axis of symmetry is x = -4.

Find the Vertex and Axis of Symmetry of the Graph f(x)=x2+8x+20f ( x ) = x ^ { 2 } + 8 x + 20f(x)=x2+8x+20

Find the Vertex and Axis of Symmetry of the Graph $f ( x ) = x ^ { 2 } + 8 x + 20$