Pearson's Correlation (2 of 3)
A correlation of -1 means that there
is a perfect negative linear relationship between variables. The
scatterplot shown below depicts a negative relationship. It is
a negative relationship because high scores on the X-axis are
associated with low scores on the Y-axis.
A correlation of 0 means
there is no linear relationship between the two variables.
The second graph shows a Pearson correlation of 0.
Correlations are rarely if ever 0, 1, or -1. Some real data showing a
moderately high correlation are shown on the next page.