wxMaxima is a graphical user interface for the computer algebra system Maxima. It eases the use of Maxima by making most of its commands available through a menu system and by providing input dialogs for commands that require more than one argument. It also implements its own display engine that outputs mathematical symbols directly instead of depicting them with ASCII characters.
wxMaxima also features 2D and 3D inline plots, simple animations, mixing of text and mathematical calculations to create documents, exporting of input and output to TeX, and a browser for Maxima's manual including command index and full text searching.
To install wxMaxima in all currently supported versions of Ubuntu open the terminal and type:
sudo apt install wxmaxima
wxMaxima is not so hard to use for static data visualizations. If you want an interactive data visualization with inline widgets that let you change the visualization on the fly then you're looking at something that requires some programming like this answer which I wrote in Python.