What type of graph should Dr. Kennedy use to predict future medicine orders?

A line graph is the most suitable choice for predicting future medicine orders because it effectively displays data points over a period of time. This type of graph allows for clear visualization of trends, making it easier to identify patterns or changes in order quantities over weeks, months, or even years. By plotting the data points sequentially and connecting them with a line, Dr. Kennedy can clearly see the trajectory of medicine orders, facilitating predictions based on past trends.

In contrast, a bar graph is better suited for comparing discrete categories rather than showing trends over time. A pie chart provides insight into proportions but lacks the ability to display changes over a timeline, thus is not effective for prediction purposes. A scatter plot illustrates relationships between two variables but does not convey a clear trend over time, making it less ideal for forecasting future orders. Therefore, for the intent to predict future trends, the line graph is the most effective tool.