What is the axis of symmetry and vertex for the graph y=x^2+6x-7?

Jun 29, 2016

Vertex (-3, -16)

Explanation:

x-coordinate of vertex, and of axis of symmetry:
$x = - \frac{b}{2 a} = - \frac{6}{2} = - 3$
y-coordinate of vertex:
y(-3) = 9 - 18 - 7 = -16
Vertex (-3, - 16)
graph{x^2 + 6x - 7 [-40, 40, -20, 20]}