Step-by-step explanation:
we see the points marked (-1, -1) and (2, -2).
the rate of change is so called the slope of the line and is the ratio of y/x indicating how many units y changes, when x changes a certain amount of units when going from one point to another.
so, here
x changes by +3 units (from -1 to 2),
y changes by -1 unit (from -1 to -2).
so the slope is -1/3
