Hope you understand the solution. Call my attention if you need any help
Answer:

Step-by-step explanation:
Given: 
To find: average rate of change of the function
over the interval
and 
Solution:
Take 
Find 

Average rate of change of the function 

Rewrite the equation;
3x-y=3
3x-3=y
Linear equation.
I'm unsure of what the second part asks. Can you rewrite the given question?
Since your looking for the increase you can take the number from 2004
and 2014 and turn it into a fraction
54/135
now that you've done that times it by 100 like this
54/135 x 100=
40
and that will give you the percentile which is:
40%
Hope that helps X3