** Consistent ** -
A system of equations with at least one solution.

** Dependent ** -
A system of two linear equations if *dependent* if the equations describe the same line.

** Inconsistent ** -
A system of equations with no solutions.

** Independent ** -
A system of two linear equations is *independent* if the equations describe distinct lines.

** System of Equations ** -
A set of two or more equations with the same variables.

** Underdetermined ** -
A system in which there are more variables than equations is *underdetermined.*