What is a method of structuring concepts using a graphical notation in the form of a diagram called?

I would suggest pie charts and histograms do not structure concepts, rather they display data.

little b, I’m not good at maths

I'm not good at maths

I solved it in 0.2 sec

chet, ..."it's all in your mind"..🎭🕶️

Diagrams for representing data and information is used in mathematics in the form of Bar graph, Histogram, Stacked Bar graph, Area graph, Line graph and Bubble graph.