These tables represent an exponential function. Find the average rate of change for the interval from x = 8 to x = 9.
х
Interval
0
1
2
3
y
1
3
9
27
81
243
729
O to 1
1 to 2
2 to 3
3 to 4
4 to 5
5 to 6
Average rate
of change
2
|]x3
6
]*3
18
]x3
54
3x3
162
| x3
486
4
5
6
O A. 19,683
B. 6561
O C. 13,122
D. 3