To effectively communicate the comparative danger of a set of intersections based on the number of accidents, a point plot would be the most efficient representation among the options provided.
Point plots allow for the visualization of numerical data along a continuous scale, making it easy to compare the number of accidents across different intersections. This representation can clearly illustrate which intersections have higher or lower accident rates, enabling quick and effective comparison.
While tables provide numerical data, they can be less visually impactful and harder to interpret at a glance. Pie charts are not suitable for comparing quantities as they are better for showing proportions. Formulas do not visually represent data and would not be suitable for comparative analysis.
Thus, a point plot is the best choice for this situation.