This graph shows the total number of extra daily walks taken by different groups as the number of extra daily walks per person increases from 0 to 5. The "Walk Only" group sees a linear increase in total extra walks as each additional person walks more each day. The "Quote" groups, which include both walkers and non-walkers, see a slower sub-linear increase as not all members of the group increase their daily walks.

4. 0
0.5
1
1.5
2
2.5
1 2 3 4 5 6
NUMBER OF EXTRA DAILY WALKS PER PERSON
Quote Walk Only

5. 0
2
4
6
8
10
12
14
16
18
20
Quote Quote Quote Quote Quote Walk Walk Walk Walk Walk
Total extra walks by each person in each group