A student conducted a 4 week training program investigating how different aerobic activities affect resting heart rate. Which of the following is the MOST appropriate method to present the findings?
- A single bar graph showing only the final heart rate values for each activity
- A detailed written description of heart rate changes without visual aids
- A pie chart showing the percentage decrease in resting heart rate for each activity
- A line graph showing weekly changes in resting heart rate for each activity across the 4-week period