Here the points are(-3,-1) and (5,-1)
To find the average rate of change, we have to use the following formula .

Here x1 =-3, y1=-1, x2=5,y2=-1
So we get
Average rate of change=

So the average rate of change from x=-3 to x=5 is 0
1/4 is equal to 25% and 0.25, hope this helps