Interpret distance/time graphs when the speed is variable

1. Mail it with Mike - Travel graph: Calculate average speed, not including stops
2. Mail it with Mike - Travel graph: Calculate average speed, including stops
3. Mail it with Mike - Travel graph: Calculate average speed, including stops
4. Mail it with Mike - Travel graph: Calculate average speed
5. Mail it with Mike - Travel graph: Identify parts of trip with same average speed
6. Mail it with Mike - Travel graph: Identify slowest part of trip
7. Mary's Mini - Travel graph: Calculate average speed
8. Mary's Mini - Travel graph: Calculate average speed
9. Mary's Mini - Travel graph: Calculate average speed
10. Mary's Mini - Travel graph: Difference in average speeds
11. Mr Hall's Rugby Tour - Graphs: Distance v. time, calculate average speed
12. Mr Hall's Training Hour - Graphs: Distance v. time, relationship slope v. speed
13. Mr Hall's Training Hour - Graphs: Distance v. time, calculate average speed
14. Mr Hall's Rugby Tour - Graphs: Distance v. time, calculate average speed
15. Mr Hall's Rugby Tour - Graphs: Distance v. time, calculate average speed
16. Mr Brown - Interpret graph: When is maximum speed?
17. Mr Brown - Interpret graph: Estimate acceleration at 1.7 sec
18. Mr Brown - Interpret graph: Estimate acceleration at 1.7 sec
19. Mr Brown - Interpret graph: Estimate acceleration at 1.5 sec
20. Mr Brown - Interpret graph: Estimate when acceleration was 8m/s/s
21. Mr Brown - Interpret graph: Estimate when acceleration was 6.5 m/s/s
22. Mr Brown - Interpret graph: Estimate acceleration at 2.5 secs
23. Mr Brown - Interpret graph: When was acceleration 4 m/s/s?
24. Mr Brown - Interpret graph: Time of zero acceleration?
25. Mr Brown - Interpret graph: Maximum acceleration?
26. Mr Hall's Rugby Tour - graphing distance v. time, calculate average speed