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 reallife 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

xaxis

yaxis