# Wave propagation 4

The above top is a graph showing the displacement of a wave at a particular instant, which is propagating to the right, as a function of position $$x$$. The speed of the wave is $$8$$ m/s. Which of the $$4$$ graphs $$A$$, $$B$$, $$C$$ and $$D$$ is appropriate for the displacement at the position $$x=4 \text{ m}$$ as a function of time passing from this moment on?

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