Answer:
55
Step-by-step explanation:
No matter what happens in between, the average rate of change between 2 points of any interval is the slope of the 2 points of the interval.
The 2 points are (-8, -50) and (-6, 60), and we need to find the slope (which, as a reminder, is change in x over change in y):
(60-(-50))/(-6-(-8)) = (110)/(2)=55
Therefore, the average rate of change between the interval -8≤x≤-6 is 55.
