Question

which best describes the purpose of bar graphs? they show changes over a period of time. they compare quantities for particular categories. they show the relationship among parts of a whole. they compare ranges as continuous data.

Explanation:

Bar graphs use bars of different lengths to represent and compare quantities for distinct categories. Line graphs show changes over time. Pie charts show the relationship among parts of a whole. Histograms (a type of bar - like graph for continuous data) compare ranges as continuous data, but standard bar graphs are for categorical data.

Answer:

They compare quantities for particular categories.