The linear model represents the height, f(x), of a water balloon thrown off the roof of a building over times, x measured in seconds. During what interval(s) of the domain is the water balloon's height staying the same?
0 ≤ x ≤ 2
2 ≤ x ≤ 5
5 ≤ x ≤ 6
6 ≤ x ≤ 8
