Answer:
30/13
Step-by-step explanation:
The rate of change of any linear function is the slope of the line, written as (change in y)/(change in x), more commonly remembered as rise over run.
If we are given two points, (x_{1}, y_{1}) and (x_{2}, y_{2}), the slope of the line between those points is (y_{2}-y_{1})/(x_{2}-x_{1}).
We can plug in any two points on the line. I will randomly pick (-1, -17) and (-7.5, -32). Plugging into the formula gives (-32-(-17))/(-7.5-(-1))=-15/-6.5=-30/-13=30/13.
This means the slope of the line and hence the rate of change is \boxed{30/13} and we're done.
