# 4. Find patterns of association (A)

teaches Common Core State Standards CCSS.Math.Content.8.SP.A.1 http://corestandards.org/Math/Content/8/SP/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5

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Lesson objective: Apply patterns of association to scatter plots.

This lesson provides an opportunity for students to apply their knowledge and understanding of patterns of association for scatter plots to a real-life situation. Students are asked to determine if there is an association between the weight of a dog and its lifespan.

Key Concept students will use:

• Patterns of association (clustering, outliers, positive or negative association) may emerge when bivariate data are displayed in a scatterplot (as one increases, the other increase or decreases, linear or nonlinear, etc.).

Skills students will use:

• Identifying independent and dependent variables (Grade 6, Unit 5)
• Graphing points in the first quadrant (Grade 5, Unit 14)
• Identifying the slope of a linear association (Grade 8, Unit 7)

Students engage in Mathematical Practice 5 (Use appropriate tools strategically) as they use a scatter plot to determine if there is an association between the weight of a dog and its lifespan.

Key vocabulary:

• bivariate data
• consistent scale
• dependent variable
• independent variable
• negative association
• patterns of association
• positive association
• scale break
• scatter plot
• x-axis
• y-axis
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