An internal auditor is reviewing a scatter plot of overtime hours (X-axis) versus manufacturing defects (Y-axis). The plot shows a tight cluster of points rising from left to right. What is the most appropriate conclusion?

There is a strong positive correlation between overtime hours and defects, suggesting fatigue may be a cause of quality issues.

There is a strong negative correlation; increasing overtime reduces defects.

There is no correlation between the variables.

Overtime hours cause defects.