A body begins to walk eastward along a street in front of his house and the graph of his position fromhome is shown in the following figure. His average speed for the whole time interval is equal to

A body begins to walk eastward along a street in front of his house and the graph of his position from home is shown in the following figure. His average speed for the whole time interval is equal to

Question: A body begins to walk eastward along a street in front of his house and the graph of his position from home is shown in the following figure. His average speed for the whole time interval is equal to