Answer:
1500
Step-by-step explanation:
The average rate of change of a function on the interval [a, b] is given by ...
rate of change = (f(b) -f(a))/(b -a)
On the interval [7, 9], the average rate of change is ...
(5760 -1920)/(9 -7) = 3840/2 = 1920
On the interval [4, 6], the average rate of change is ...
(945 -105)/(6 -4) = 840/2 = 420
The rate of change on the first interval is greater by ...
1920 -420 = 1500
