A. From the graph,
Part 1 shows that the bus is moving at a distance with respect to time.
Part 2 shows that the bus is not moving within a specific time, since no upward or downward movement on the graph.
Part 3 shows that the bus started moving again after stopping for a while.
Part 4 shows that the bus is not moving.
Part 5 shows that the bus is slowing down until it goes to rest.
B. Parts that are increasing :
Part 1 and 3
Parts that are decreasing :
Part 5
Parts that are constant :
Part 2 and 4
C. The graph is linear if it shows a straight line.
Since the graph doesn't show a straight line, therefore, this is non-linear