Try Octave.

Octave is a high-level language, primarily intended for numerical
computations. It provides a convenient command-line interface for
solving linear and nonlinear problems numerically.^{1}

To install, you can download it from source, or by clicking **Octave**

Gnuplot.

Gnuplot is a portable command-line driven graphing utility for Linux,
OS/2, MS Windows, OSX, VMS, and many other platforms. It was
originally created to allow scientists and students to visualize
mathematical functions and data interactively, but has grown to
support many non-interactive uses such as web scripting. It is also
used as a plotting engine by third-party applications like Octave.
Gnuplot has been supported and under active development since 1986.^{2}

To download and install click Gnuplot development

^{1Source:Ubuntu Apps}

^{2Source:Gnuplot}