Very 20th - century method, but in short it is a single numeric representation of the rate / term. (biggerpockets.com)
New research indicates that the brain region may prefer symbolic notation to other numeric representations — a finding that could open the door to helping kids plagued by dyscalculia, a learning disability characterized by severely impaired mathematical ability. (scientificamerican.com)
They can incorporate colors, timelines, graphic or numeric representations of skills, maps, charts, graphs, or anything else. (thegrindstone.com)