Correlation coefficients are indicators of the strength of the linear relationship between two different variables, x and y. A linear correlation coefficient that is greater than zero indicates a ...

A strong positive linear correlation exists between the numbers of occurrences of triad and quadriad motifs in human cell-specific transcription factor regulatory networks.

Image source: Sifr Data A simple glance at this correlation graph can show that the relationship between Bitcoin and S&P 500 is at a weak positive relationship.