Chapter 3: Describing Relationships

Chapter 3 calendar

Here are the topics we will study in this chapter. Underneath each section you will see the AP classroom daily video that corresponds to that particular topic. You need to sign in to AP classroom to access these support videos; these should be on your homepage. Here are the steps you can do to access these videos.

3.1 Describing Relationships

2.4 Daily Video 1: Explanatory and Response Variables and Scatterplots
2.4 Daily Video 2: Demonstrate how to describe a scatterplot
2.5 Daily Video 1: Using the correlation (r) to interpret a linear relationship
2.5 Daily Video 2: Difference between correlation and causation
2.6 Daily Video 1: Linear Regression model and predictions
2.6 Daily Video 2: Dangers of Extrapolation
2.7 Daily Video 1: Calculating and interpreting residuals; constructing a residual plot
2.7 Daily Video 2: Using residual plots to determine if a linear model is appropriate

3.2 Least-Squares Regression

2.8 Daily Video 1: Explanation of the LSRL
2.8 Daily Video 2: Interpreting slope and y-intercept of linear model
2.8 Daily Video 3: Interpreting the coefficient of determination and computer output for regression
2.9 Daily Video 1: Find and categorize influential points

We will use this note packet for this chapter for our sessions and some assignments.

Here are some instructional videos that you may find useful in this chapter.

TI-84CE: LSRL, correlation coefficient, predict y (y-hat)

Here is how to calculate these statistics from a data set.

Explanation of WS:

Matching Graphs and Coefficient of Determination

This video will help you understand how to match the data to it's corresponding LSRL and r-squared. The idea is to analyze how an outlier effects the overall relationship of the LSRL and r-squared.

Google Sheets: LSRL and r-squared

You can use your data in sheets to create the LSRL and r-squared value. If you'd rather use your calculator, you can. Just take a photo of your calculator screen for your project.

Google Sheets: Making a residual plot

You can use your data in sheets to create a residual plot. If you'd rather use your calculator, you can. Just take a photo of your calculator screen for your project.

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