The wave equation y = 0.05 sin(20πx − 100πt) SI units. The wave speed is

1. General form: y = A sin(kx − ωt) with k = 20π rad/m and ω = 100π rad/s. 2. Wave speed v = ω / k. 3. v = (100π) / (20π) = 5 m/s. 4. So the wave travels 5 m per second in the +x direction. _Source: syllabus Physics, Ch 14 "Waves", §14.3_