Answer:
120 meters
Step-by-step explanation:
To find the displacement in the velocity-time graph, we can do that by finding the area under the graph. Since from t = 0 to 4, the points form a right triangle, we can find the area by using triangle area formula:

We know that base is 4 and height is 60. Therefore:

Since area is 120 under the graph then that means the displacement is 120 meters.