IM Algebra 1 Unit 3.7 Practice: The Correlation Coefficient

This GeoGebra example demonstrates how to visualize the linear relationship between two variables using a scatter plot and compute the correlation coefficient r. The core mathematical concept is the correlation coefficient, which quantifies how closely data points cluster around a best-fit line, ranging from -1 to 1, with sign indicating direction. Construction involves plotting data points as a scatter plot, adding a linear regression line, and using statistical tools to output the r-value. This practice is suitable for middle-to-high school students learning introductory statistics, helping them interpret scatterplots and understand the strength and direction of linear associations, preparing them for more advanced regression analysis.