17 has the most reason for it to be right
Answer:

Step-by-step explanation:
we know that
The equation of a exponential growth function is equal to

where
y is the average annual salary
x is the number of years
r is the rate of change
a is the initial value
In this problem we have

substitute


For x=4 years

The answer will be x= -3/5
If you factor it then your answer will be -3(-3z-5) if you simplify the answer is 9z+15