Answer:
h=1
Step-by-step explanation:
f(x) = -2 (x-h)^2 +4
The vertex is on the axis of symmetry, which is halfway between 2 symmetric points
We have point (0,-6) and (2,-6)
The x point for the axis of symmetry is halfway between these two points or (0+2)/2 = 2/2 =1
The axis x=1
The vertex is on this so h=1