Linear Regression and Correlation
Read this chapter to learn how to use graphs, such as scatter plots, to analyze the relationship between two variables. Two variables may be positively or negatively related when different pairs of data show the same pattern. For example, when incomes of individuals rise so does their consumption of goods and services; thus, income and consumption are considered to be positively related. As a person's income rises, the number of bus rides this person takes falls; thus, income and bus riding are negatively related. Make sure you read the introduction as well as sections 13.1 through 13.7. Attempt the practice problems and homework at the end of the chapter.