Math 10C Module 4: Lesson 1

Module 4: General Relations

 

Lesson 1 Summary

 

In this lesson you investigated the following questions:

  • How do you know whether a variable is dependent or independent?
  • How can a graph be used to describe a situation?

In this lesson you learned that when two quantities are compared, one is the independent variable and the other is the dependent variable. The independent variable is the variable for which values are selected. The values of the dependent variable are determined based on the independent variables. You analyzed different contexts to practise identifying dependent and independent variables. You used the technique of making a sentence with the variable names to help you decide which variable is dependent on the other.

 

In this lesson you also examined graphs and explored how you can interpret graphs based on their features. You studied distance-time and speed-time graphs and learned how to interpret horizontal segments, vertical segments, and diagonal segments. You learned that a graph can describe many characteristics of a situation.

 

In Lesson 2 you will examine relations. You will learn to recognize when it is appropriate to connect the points of a graph and when it is inappropriate to do so. You will also learn two other words to describe the values of the dependent and independent variables.

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