The sample space of an experiment is S={1, 2, 3, 4, 5} . If each outcome is equally likely to occur, which graph models the expected probability of each outcome?

A bar graph would be the most appropriate graph to model the expected probability of each outcome in this case, as it allows for a clear visual representation of the likelihood of each outcome occurring. Each bar would represent a different outcome (1, 2, 3, 4, 5) and the height of each bar would represent the expected probability of that outcome occurring, assuming each outcome is equally likely.