Construct and discriminant validity of the single - item measures was assessed using Pearson product moment correlation. (scirp.org)
This pack of presentations and activities covers straight line correlation including Product Moment Correlation Coefficient, Least Square Regressio... (tes.com)
A table is given to be completed for Spearman's Rank Correlation Coefficient, but could easily be adapted for Product Moment or simply for scatter graphs and lines of best fit. (tes.com)