These tables represent a quadratic function with a vertex at (0, 3). What is the average rate of change for the interval from x = 8 to x = 9?
х
Interval
у
3
0
1
2
WN
-1
-6
0 to 1
1 to 2
2 to 3
3 to 4
4 to 5
5 to 6
Average rate
of change
-1
3-2
--3
1-2
-5
1-2
-7
1-2
-9
1-2
-11
4
-13
Ooh
-22
--33