Final answer:
A bar graph is best used to compare quantities, such as showing how many people prefer paper bags versus plastic bags. It provides a clear visual comparison of different categories through the use of side-by-side bars, distinguishable colors, and clear labels.
Step-by-step explanation:
For which purpose would you most likely use a bar graph? The answer is C: To show how many people in one city prefer paper bags and how many prefer plastic bags. Bar graphs are a powerful tool for comparing quantities and are most effective when you need to visually depict and compare different categories or groups side-by-side. When presenting data such as the preference for paper or plastic bags among people in a city, a bar graph allows viewers to easily compare the quantities of each category. Each bar can represent the number of people preferring paper bags versus those preferring plastic bags.
Clear labeling and a legible scale are crucial to ensure that the information is conveyed effectively. Additionally, using distinguishable colors for each category aids in quick comprehension. While a pie chart might be better for showing percentages, a bar graph is superior when it comes to illustrating the actual number of individuals in each preference category, thereby providing a clear visual comparison of the two options.