Final answer:
A dot map is used to represent the distribution of a variable in a geographic area, using dots or symbols on a map to indicate the presence or quantity of the variable at specific locations.
Step-by-step explanation:
A dot map, also known as a dot distribution map or dot density map, is used to represent the distribution of a variable in a geographic area. It is created by placing dots or symbols on a map to indicate the presence or quantity of a particular variable at specific locations.
Different sizes or colors of dots can be used to represent different quantities or categories of the variable being mapped. Dot maps are particularly useful for showing spatial patterns and identifying areas of high or low concentration of the variable.
For example, a dot map can be used to represent the distribution of population density across different neighborhoods in a city, with each dot representing a certain number of people. This can help visualize areas with higher or lower population densities and identify patterns or trends.