Final answer:
The rate of change in the average NFL ticket price from 2006 to 2015 is $2.67 per year, calculated by the increase in ticket price divided by the number of years.
Step-by-step explanation:
The rate of change in the average price of NFL tickets from 2006 to 2015 can be calculated by taking the difference in prices and dividing it by the number of years over which the change occurred. The average price in 2006 was $62, and it increased to $86 in 2015.
Rate of change = (Final value - Initial value) / Number of years
Rate of change = ($86 - $62) / (2015 - 2006)
Rate of change = $24 / 9 years
Rate of change = $2.67 per year (to two decimal places)
So, the average annual rate of change in the ticket prices over this period was $2.67 per year.