A study is being done to compare the amount of rainfall per month for two towns. Which of these types of graphs would best display this data so that the amount of rainfall could be compared for several months?

Step 1 ：Consider the following graph types: bar graph, line graph, pie chart, and scatter plot.

Step 2 ：A bar graph can display the data for each month side by side, making it easy to compare the rainfall amounts for the two towns.

Step 3 ：A line graph can show trends over time, but it might not be as clear for comparing the two towns' rainfall amounts directly.

Step 4 ：A pie chart is not suitable for this type of data, as it is used to display parts of a whole.

Step 5 ：A scatter plot is used to display the relationship between two variables, but it might not be the best choice for comparing rainfall amounts for two towns over several months.

Step 6 ：\(\boxed{\text{A bar graph would be the best choice to display the data for comparing the amount of rainfall per month for two towns.}}\)