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.