Final answer:
To receive an A in algebra, Kathy needs to score at least 84% on her final exam. The graph representing all possible scores would be a vertical line segment starting at 84% on the y-axis and extending upwards.
Step-by-step explanation:
In order to receive an A in algebra, Kathy needs to score at least 84% on her final exam. The graph representing all possible scores that Kathy could get in order to receive an A in her class would be a vertical line segment starting at 84% on the y-axis and extending upwards.
No scores below 84% would be included in the graph, as they would not meet the requirement for an A grade.