In a Lagrangian system, the position of a fluid particle in a flow is described as $x=x_0e^{-kt}$ and $y=y_oe^{kt}$ where $t$ is the time while $x_o, \: y_o$, and $k$ are constants. The flow is
- unsteady and one-dimensional
- steady and two-dimensional
- steady and one-dimensional
- unsteady and two-dimensional