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