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The Pearson product-moment correlation coefficient is a measure of strength and direction of association between variables measured in an interval scale or ratio level.
It attempts to draw a line of best fit between these variables, and the Pearson correlation coefficient shows how far these points are away from the line of best fit i.e. the degree to which the relationship is linear.
If your variables are, dichotomous you can use a point-biserial correlation and if you have more than one control variables, you use Pearson’s Partial correlation.
A single output correlation table is generated containing the correlation coefficient, its significant value and the sample size that the calculations were based on.
A bigger value indicates a strong, positive correlation.