8. A graph that shows how something changes or fluctuates in value is a bar graph. line graph. column graph. pie graph. 9. Which type of chart or graph uses picture symbols to show a comparison between numerical units? O flowchart pictogram pie graph bar graph 10. If you want to emphasize the differences between economic classes in the United States, you should utilize an) poster with the phrase "The gap is huge" printed in very large font. pie graph showing how different economic classes spend money. organizational chart of a major United States corporation. bar graph showing the number of people in each economic class