Lesson 3
1. Lesson 3
1.5. Explore 4
Module 3: Algebra
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There is a special name for the points that lie beyond the trend. They are called outliers. As shown in the scatterplot graphs, when little or no outliers are present, correlation is strongest. With the presence of many outliers, correlation is weaker.
Outlier(s) is/are data point(s) that lie significantly outside the general trend of the data.
Source: MathWorks 12 Student Book/Teacher Guide.
(Vancouver: Pacific Educational Press, 2011.)
Try This 3
Go back into Scatter Plots—Activity A.
Screenshot reprinted with permission of ExploreLearning
Select “Show actual trend line.”
What happens to the slope of the line from the equation as you move the trend slider from negative to positive?
Remember that y = mx + b is the equation of a line, and m represents slope.
Save your response in your course folder.
Take note of the following:
- Positive correlation occurs when the slope of the line is positive (i.e., rising to the right).
- Negative correlation occurs when the slope of the line is negative (i.e., falling to the right).
Try This 4
Complete “Discuss the Ideas” questions 1, 2, 3, and 4 on pages 49 and 50 of the textbook.
Save responses to your course folder.
Share 2
Share your responses to Try This 4 with a partner or a group.
- Were your responses to the questions the same as or different than the others? Explain.
- Through this share activity, have you improved your understanding of this concept? Or were you able to help your partner or others in the group improve their knowledge and understanding? Explain.
If required, place a summary of your discussion in your course folder.