The graph shows how the distance travelled by a vehicle varies with time. Which row describes the vehicle’s speed in each part of the graph?
- AP to Q: constant, Q to R: zero, R to S: constant
- BP to Q: constant, Q to R: zero, R to S: decreasing
- CP to Q: increasing, Q to R: constant, R to S: decreasing
- DP to Q: increasing, Q to R: zero, R to S: constant