Answer:
The parts where it is increasing, decreasing or constant are given below.
It is not a straight line at 1, 3 and 5 so it is non-linear at those parts and it is straight line at 2 and 4 so, it is linear at those parts.
Step-by-step explanation:
The graph of the function is,
1. increasing at 1 and 5
2. decreasing at 3
3. constant at 2 and 4.
It is not a straight line at 1, 3 and 5 so it is non-linear at those parts and it is straight line at 2 and 4 so, it is linear at those parts.
