What kind of graph is most useful when you want to compare values for different ranges or intervals?

A bar graph is most useful for comparing values across different ranges or intervals. It visually displays discrete categories along one axis and their corresponding values along the other, making it easy to compare the heights of the bars. This format allows for clear differentiation between the categories, facilitating straightforward comparisons of their values. For displaying intervals specifically, a histogram can also be effective, as it groups data into ranges to show frequency distributions.