Question

What is the axis of symmetry and vertex for the graph `y = -2x^2 - 4x + 7`?

Answer 1

Vertex (-1, 9)

Explanation:

x-coordinate of vertex, and of the axis of symmetry:
`x = -b/(2a) = 4/-4 = - 1`
y-coordinate of vertex:
y(-1) = -2 + 4 + 7 = 9
Vertex (-1, 9)