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

--26
1-37