Problem:

 

Sam is participating in a 10-mile race.  The race has checkpoints every 2 miles. 

 

Sam’s times at each checkpoint are recorded in the table below.

 

Checkpoint

1

2

3

4

5

Distance (miles)

2

4

6

8

10

Time (Minutes)

15

25

40

45

57

 

1.      Between which two checkpoints was Sam going the fastest?

2.      Between which two checkpoints was Sam going the slowest?