9514 1404 393
Answer:
Step-by-step explanation:
The marks on the graph show the vertical change is 1 unit, and the horizontal change is 2 units.
The "rate of change" is the ratio of vertical change to horizontal change:
rate of change = slope = Δy/Δx = 1/2 = 0.5
Expressed as a decimal, the rate of change is 0.5.