We need to use the formula to find the average rate of change between a and b:
In this case, since we are asked for the average rate of change from x=-4 to x=0
Now we find f(a) which is the value of the function at a. In this case, we need f(-4):
We do the same to find f(b), which in this case is f(0), so we look for the value of the y-axis (the function) at x=0:
Now we substitute in the initial formula for the average rate of change: