aph shows the heart rate of a runner during a 4 minute interval. Please describe the following:
1. The range of the runner's heart rate
2. The intervals where the runner's heart rate is increase
3. The interval where the runner's heart rate is decreasing.
4. The interval where the runner's heart rate is staying the same.
5. Create an equation to represent the linear portions between 2 and 3 minutes AND the range between 3 and 4 minutes.
6. Explain what you think is happening to cause these changes in heart rate.
Please explain all steps and show all work!