Question

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

Answer 1

Vertex (-3, -16)

Explanation:

x-coordinate of vertex, and of axis of symmetry:
`x = -b/(2a) = -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]}