Answer: The rate of change is 1
According to the graph, the given points are (3, 0) and (0, -3)
Point A = (3, 0)
Point B = (0, -3)
Rate of change = slope
Slope = y2 - y1 / x2 - x1
Let x1 = 3, y1 = 0, x2 = 0 and y2 = -3
Slope = -3 - 0 / 0 - 3
Slope = -3 / -3
Slope = 1
Therefore, rate of change is 1