Question

the representation of numbers using bars of uniform width is called

Answer 1

I think it is a bar graph
..

Answer 2

Bar graph is the representation of numbers using bars of uniform width.

Bar graph:  

• Presentation of data or facts by pictograph takes a lot of time and can be difficult as well.  
• A technique was developed to represent data in something that is visually soothing and easy to understand.
• The technique in bar graph is to present the data in form of bars or rectangle shape boxes the width and length are determined by the values of the function represented on X-Y graph.