When no numeric ordering of data is needed, you should use a

Bar graph

Line Plot

Histogram

Answer: Bar graph is to be used, when no numeric ordering of data is needed.

Explanation:

As, bar graphs are used to compare the things between different groups and also used to track changes over the time. Basically, bar graph is used to represent graphing the non numeric data. Any graph of non numeric data need to show the two main things that is: the size and the category. We can labelled each bar graph by its category below the axis.