The wave is moving at 1 m/s, which means that it moves 1 meter per second. The history graph is a displacement graph that compares time and distance. There is no movement along the y-axis between 0 and 1 second. This means that if the wave moves 1 m towards the right in 1 second there is no movement of the y-axis. This data is the basis for the snapshot graph. -2 -1 Refer the history graph. (1) The wave’s movement to the right in 1 second starts at t=1. There is a change of y from -1 cm. This means that if wave moves 1 m to its right, there will be a change of y at X=0. (ii) Starting from t=2, when the wave moves to the right in 1 second, there is no change in y. This means that even if wave moves 1 m to its right, there is no change in y at the x= 0. This will result in a snapshot graph with y=-1–1 cm for x=-2-3 m.

– 4 3 2 1 iii. When the wave moves to one side in a second, there will be a change of y to 1 cm. This means that if wave moves 1 m to its right, the change in y is 1 cm. This data will result in a snapshot graph with y=-1- -1 cm. -4 3-2 (iv). When the wave moves 1 second to the right, there is an increase in y to 0. This means that if wave moves 1 m to its right, there will be a change in the y to 0 am at value x = 0. This will result in a snapshot graph with y=1-0 cm for X=-3 to + 4 m. The second option is correct.