Final answer:
Regression analysis (RA) is a statistical method used to predict a variable from one or more predictor variables. It involves finding the line of best fit on a scatter plot and using that line to make predictions about the data.
Step-by-step explanation:
Regression analysis (RA) is the statistical method used to predict a variable from one or more predictor variables. It involves finding the line of best fit on a scatter plot and using that line to make predictions about the data. Residuals, or errors, measure the distance between the actual and estimated values. Regression analysis is commonly used in various fields, such as geography, social sciences, and economics, to understand relationships between variables and make predictions.