- To investigate rates in real life.
- To see the importance of understanding rates.
- To explore percent change.
- To practice with direct proportion in real life.
- Sit in a relaxed position without crossing any of your limbs.
- Take your pulse for 20 seconds. To do this you can place your middle and pointer fingers firmly on your neck, wrist, or the inside of your elbow.
- Record the pulse you counted when the time is up.
- If your heart continued at this rate, how many times would your heart beat per minute?
- If your heart continued at this rate, how many times would your heart beat per hour?
- If your heart continued at this rate, how many times would your heart beat per week?
- Using this link to lookup factors that may influence the amount of times a person’s heart beats per minute. Based on this do you think your weekly estimate is too high or too low? Why?
- What would be a more accurate prediction as to how many times your heart beats a week?
Discuss your responses to the questions above with a classmate, then answer the questions below.
- Was their heart beat per minute greater or lower than yours?
- What was their weekly estimate for the amount of times their heart will beat? Compare and contrast how you arrived at your estimates.
- A normal person will have a resting heart rate between 60 and 100 beats per minute. Some people have heart rates that are over 100 beats per minute. These people have a condition known as Tachycardia. If you were a doctor and had a patient who had a resting heart rate of 9000 beats per hour would you diagnose them with Tachycardia? Why or why not?
- If someone with a resting heart rate of 9000beats per hour was diagnosed as Tachycardiac, by what percent does their heart rate differ from the average resting heart rate of a healthy person (80 beats per minute)?
- Take the average of you and your partner’s heart beats per minute. By what percent does your collective average heart rate differ from the average resting heart rate of a normal healthy person (80 beats per minute)?
- Is there a way that you could increase this percent difference from your findings? How?
- If your resting heart rate increased by 10% would you still be considered healthy? Explain.