Question

What is the axis of symmetry and vertex for the graph `y=-x^2+4x+5`?

Answer 1

Vertex (2, 9)

Explanation:

x-coordinate of vertex, or axis of symmetry:
`x = -b/(2a) = -4/-2 = 2`
y-coordinate of vertex, with x = 2
y(2) = -4 + 8 + 5 = 9
Vertex (2, 9)