Question

What is the axis of symmetry and vertex for the graph `y=3x^2-8`?

Answer 1

`(-b)/(2a)` gives the `x` coordinate for the vertex.

`0/-6=0`

When `x=0`, `y=-8`

So the vertex is (0,-8) it is a minimum as the quadratic is positive and the line of symmetry is the `y` axis.