Lesson 2: Lines of Best Fit
Duration of Days: 4
Lesson Objective
Students will informally fit a straight line to scatter plots that suggest a linear association and assess the model fit based on the closeness of data points.
Students will create linear equations to solve problems and interpret slope and intercept in context.
How are patterns used when comparing two quantities?
8.SP.A.2: Know that straight lines are used to model relationships between quantitative variables. Informally fit a straight line to scatter plots with a linear association and judge the model fit.
8.SP.A.3: Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and intercept.
This lesson focuses on the informal construction and interpretation of trend lines for data showing linear patterns. Students will transition from observing associations to modeling them mathematically to make predictions. (DOK 2)
Difficulty interpreting what a negative slope or a specific y-intercept represents in a real-life situation.
Guided notes
Exit Ticket