Graph 1 plots how displacement varies over time at a fixed point on a progressive wave. Graph 2 shows the same wave and plots how displacement changes with distance at a particular instant. What is the wave speed?
- A$5.0\,\text{cm s}^{-1}$
- B$48\,\text{cm s}^{-1}$
- C$150\,\text{cm s}^{-1}$
- D$300\,\text{cm s}^{-1}$