Final answer:
To calculate the final displacement of the square plate, we add up the areas of the rectangle and triangle on the graph, which represent the displacement vectors.
Step-by-step explanation:
In this question, we are calculating the final displacement of a square plate. To do this, we need to calculate the area under the graph, which is the sum of the area of the rectangle and the area of the triangle. We can determine the displacement by adding up the magnitudes of the vectors.