These tables represent a quadratic function with a vertex at (0, -1). What is the average rate of change for the interval from x = 8 to x = 9?
х
Interval
O
y
-1
-2.
Average rate
of change
-1
1
1-2 W
ايادي | | |O
0 to 1
1 to 2
2 to 3
3 to 4
4 to 5
5 to 6
-10
-17
-26
-37
-3
-5
-7
-9
11-2
]-2
1]-2
4
5
1-2
-11