To solve this problem you must apply the proccedure shown below:
1. By definition, the rate of change of a linear function is the slope of the line and it is constant. Based on this, you must find the slope of the given function.
2. You have the equation of the line has the following form:

Where
is the slope and
is the y-intercept.
3. Then, you have that the slope of the function
is:

Therefore, the answer is: 
Answer:
i actually dont know im so sorry but i will keep trying to find the answer
20 am not shure am gonna work it out
Answer 16
Step-by-step explanation: