Lesson 3: Functions: Connect

Math 10C Module 4: Lesson 3

Module 4: General Relations

Connect

Lesson Assessment

Complete the lesson quiz posted under the Assess tab or by using the Quizzes link under the Activities block. Also, ensure your work in your binder (course folder) is complete.

Project Connection NOT ASSIGNED

This photo shows participants in a cross-country skiing competition.

In the Focus section of this lesson, you read about the relationship between speed and heart rate in cross-country skiing. Following is a graph that illustrates this relation.

This shows a graph of heart beats (per minute) versus speed (km/hour).

Is this relation of speed to heart rate a function? Why or why not?

Your heart rate is the number of times your heart beats in one minute.

One way to measure your heart rate is to take your pulse. The two most common spots used to measure your own pulse are the artery on the thumb side of your wrist and the artery on the side of your neck.

This shows an illustration of two ways of taking a pulse: on the neck and on the wrist.

To take your pulse, touch the artery lightly until you feel your pulse. Count the number of heart beats for 15 seconds. The heart rate is the number of times a person’s heart beats in one minute, so multiply by four to find your heart rate.

You may wish to practise a couple of times. Once you are confident that you can find your pulse, go to the Unit 3 Project to complete the Module 4: Lesson 3 component.