Answer:
Line of symmetry: -b/2a = 0 because b is 0 and a is 1
y-intercept is when x=0, therefore it is at 8.
x-intercept is when y=0, and you would get sqrt(-8), therefore there are no real zeros for this equation.
Vertex: (0,8)
Explanation:
To find the vertex, plug in the x-value from the line of symmetry because the vertex happens at the line of symmetry. When you set x=0, then the y-value of the vertex is 8, therefore, the vertex is at (0,8).