The average rate of change of a function f(x) over an interval (a, b) is given by

Therefore, given a function, f(x), over an interval (2, 9), the average rate of change of the function can be found using the expression
Answer:
50,000? This is my answer sorry if wrong
Step-by-step explanation:
A millennium is a period of one thousand years
It costs 0.06 cents each minute.
Explanation : $15/250 minutes = $0.06