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 rectangular bars with lengths proportional to the values they represent. Their main purpose is to compare quantities across different categories. Line - graphs are better for showing changes over time, pie - charts are for showing the relationship among parts of a whole, and histograms are for comparing ranges as continuous data.

Answer:

They compare quantities for particular categories.