15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
2
3
4
5
6
7
8
10 11 12 13 14 15 16 17 18
The average rate of change over the interval (2,5) is
The average rate of change over the interval (5,7] is
The average rate of change over the interval (2,8) is​