ALEX Classroom Resources

   View Standards     Standard(s): [MA2019] REG-8 (8) 19 :

19. Given a scatter plot that suggests a linear association, informally draw a line to fit the data, and assess the model fit by judging the closeness of the data points to the line.

[MA2019] ACC-8 (8) 35 :

35. Given a scatter plot that suggests a linear association, informally draw a line to fit the data, and assess the model fit by judging the closeness of the data points to the line. [Grade 8, 19]

In this video lesson, students' focus becomes more holistic and they begin to see a set of data points as a single thing that can be analyzed, not just a bunch of disconnected points. Students see that sometimes we can model the relationship between two variables with a line (MP4), although they continue to analyze the connections between the scatter plot and the line by comparing individual points. As they see these connections, students begin to see the structure of the scatter plot (MP7) and to use that structure to reason abstractly and quantitatively (MP2).

   View Standards     Standard(s): [MA2019] REG-8 (8) 19 :

19. Given a scatter plot that suggests a linear association, informally draw a line to fit the data, and assess the model fit by judging the closeness of the data points to the line.

[MA2019] ACC-8 (8) 35 :

35. Given a scatter plot that suggests a linear association, informally draw a line to fit the data, and assess the model fit by judging the closeness of the data points to the line. [Grade 8, 19]

In this video lesson, students focus on language in earnest (MP6), such as, “As the independent variable increases, the dependent variable tends to decrease.” Students also interpret the slopes of fitted lines in context (MP2) and identify positive and negative associations of scatter plots without a fitted line shown (MP7).