Help in writing weekly discussion

Let’s discuss the difference between positive association and negative association when describing the relationship between two variables. What do we mean by the least-square criterion? Give a general description of how the least-square criterion is involve in the construction of the least-square line. Why do we say the least-squares line is the “best-fitting” line for the data set?
Use the Internet and find a magazine or journal article in your field of major interest wherein the content of this chapter (Correlation and Regression – chapter 6) could be applied. List the variables used, method of data collection, and the general type of information and conclusion drawn.
Answer the above two questions in 650 words and make sure you follow the APA format, let me know if you have any questions.