Answer:
This graph shows the distance moved by the train with respect to time
Between t = 3 to t = 5 the train is at rest
Since this graph shows the distance covered by the train so it is a scalar quantity
Explanation:
Here from the graph we can see the distance covered by the train with respect to time
So here from the slope of this graph we can find the speed of the train
Also from t = 3 to t = 5 we can see that slope of the graph is zero
So here n this time interval there is no motion or it is at rest
Now since we know that this is distance vs time graph so it is a scalar quantity showing in this graph