Relate rate of change to the gradient of a graph

1.		Mary's Mini - Travel graph: Select fastest trip
2.		Fishing Lines - Graphs: Identify all lines with a given slope
3.		Highway Cross Over - Travel graph: Calculate time interval before stop
4.		Mail it with Mike - Travel graph: Calculate average speed, not including stops
5.		Mail it with Mike - Travel graph: Calculate average speed, including stops
6.		Mail it with Mike - Travel graph: Calculate average speed, including stops
7.		Mail it with Mike - Travel graph: Calculate average speed
8.		Mail it with Mike - Travel graph: Identify parts of trip with same average speed
9.		Mail it with Mike - Travel graph: Identify slowest part of trip
10.		Mary's Mini - Travel graph: Calculate average speed
11.		Mary's Mini - Travel graph: Calculate average speed
12.		Mary's Mini - Travel graph: Calculate average speed
13.		Mary's Mini - Travel graph: Difference in average speeds
14.		Mr Hall's Rugby Tour - Graphs: Distance v. time, calculate average speed
15.		Mr Hall's Training Hour - Graphs: Distance v. time, calculate average speed
16.		Mr Hall's Rugby Tour - Graphs: Distance v. time, calculate average speed
17.		Mr Hall's Rugby Tour - Graphs: Distance v. time, calculate average speed
18.		Mr Brown - Interpret graph: When was acceleration 4 m/s/s?
19.		Mr Hall's Rugby Tour - graphing distance v. time, calculate average speed
20.		Mr Hall's Training Hour - graphing distance v. time, calculate distance travelled