3.2.7 Lesson Summary

In this lesson, you learned how to:

• Write linear models by hand from tables and graphs.
• Describe the rate of change and $y$-intercept for a linear model in everyday language.
• Use technology to find the line of best fit.

Here are the activities that helped you reach those goals:

• 3.2.1: Selecting the Best Line
  • In this activity, you visually assessed the best line fit for data among a set of given choices. You explored bad fit, good fit, and best fit.
• 3.2.2: Determining the Best Line That Fits the Data
  • In this activity, you distinguished between linear and nonlinear relationships in bivariate, numerical data and informally assessed the fit of a linear model. You also compared the slope and the vertical intercepts of different linear models and were able to describe the relationship between
  • 3.2.2: Self Check
  • 3.2.2: Additional Resources
• 3.2.3: Writing Linear Models without Technology
  • In this activity, you were given data in either table or graphic form and then asked to find a linear model that could represent it without using technology. Once you wrote the equation in slope-intercept form, you used it to make a prediction.
  • 3.2.3: Self Check
  • 3.2.3: Additional Resources
• 3.2.4: Assessing the Fit of a Linear Model
  • In this activity, you used technology to compute a line of best fit for data given in a table and to recognize the meaning of the slope and $y$-intercept.
  • 3.2.4: Self Check
  • 3.2.4: Additional Resources
• 3.2.5: Working with Fitted Lines
  • In this activity, you had an opportunity to work with fitted lines. You identified scatter plots that showed data that would best be modeled with a linear function and the line of best fit for the data provided.

After these activities, you completed the following practice :

• 3.2.6: Practice