The correct answer is B: The degree and direction of the relationship.

Key Points:

• Correlation analysis is a statistical technique used to determine the degree and direction of a relationship between two variables.
• The correlation coefficient ranges between -1 and +1:
  • Close to +1: strong positive relationship.
  • Close to -1: strong negative relationship.
  • Close to 0: no relationship.
• Correlation does not imply causation; it merely indicates that two variables are associated.

Additional Information:

• Cause-and-effect relationship: Incorrect — correlation does not establish causation. Causation requires further analysis such as experiments or regression analysis.
• Functional relationship: Incorrect — a functional relationship is a precise mathematical expression (e.g., y = f(x)); correlation only measures association.
• Trend over time: Incorrect — trends over time are analyzed using time series or trend analysis, not correlation.