Final answer:
A decision tree is the correct answer, and it graphically represents the components of a decision table, including conditions, actions, and rules. It is used similarly to tree diagrams in probability, which help visualize possible outcomes.
Step-by-step explanation:
A decision tree is a graphical representation of the conditions, actions, and rules found in a decision table. In other words, the correct answer to the student's question is 'b. decision tree.' This tool helps in visualizing and solving problems that involve a sequence of decisions, much like a tree diagram is used in probability to determine possible outcomes. A decision tree consists of branches that represent decisions or outcomes and nodes that depict the point where a choice is made. For instance, when analyzing economic models, one might employ various graphical representations such as line graphs, pie charts, and bar graphs, which are utilized to illustrate relationships and apportionment among different variables or entities.