(1) use completing the square to get the quadratic in the form
in which case, the vertex is (h,k)
(2) use the vertex formula.
for the vertex of the quadratic , we have:
so the vertex is
we have an upward opening parabola here. the axis of symmetry is just the vertical line passing through the vertex.What ia the axis of symmetry of the parabola?
if you used method (1) above, the axis of symmetry is
if you used method (2), the axis of symmetry is
set x = 0 and solve for ywhat are the y intercepts of the parabola?
set y = 0 and solve for xApproxemetly what are the x intercepts of the parabola?
the same methods can be used for the second question