a venn diagram
a bar graph would be best I might say
Any graph can be used to determine something!
A scatter graph.
Any type of graph, really.
A line graph would be used for population [change] because you are showing how the population increases or decreases over time. If you are talking about comparing different populations at one given time, then a bar graph or pi chart would be used.
bar graph
Comparing 2 different item samples.
A pie graph is used for percentage.
a line graph
Bar graphs are used when graphing a qualitative independent variable, but a line graph is used when the independent variable is quantitative. Also when you are comparing quantity of objects(bar graph)
Bar graphs are used when graphing a qualitative independent variable, but a line graph is used when the independent variable is quantitative. Also when you are comparing quantity of objects(bar graph)
Any kind of graph can be used for discrete data.