The wave described by $y = 0.25 \sin(10\pi x - 2\pi t)$,where $x$ and $y$ are in $meters$ and $t$ in $seconds$,is a wave travelling along:

• A
  $+ve$ $x$-direction with frequency $1 \, Hz$ and wavelength $\lambda = 0.2 \, m$.
• B
  $-ve$ $x$-direction with amplitude $0.25 \, m$ and wavelength $\lambda = 0.2 \, m$.
• C
  $-ve$ $x$-direction with frequency $1 \, Hz$.
• D
  $+ve$ $x$-direction with frequency $\pi \, Hz$ and wavelength $\lambda = 0.2 \, m$.