The following quote is from the paper “The Weight of the Bottle as a Possible Extrinsic Clue with Which to Estimate the Price (and Quality) of the Wine? Observed Correlations” (Food Quality and Preference [2012]: 41–45):

The weight of the wine bottles was positively correlated (r = 0.12; p , 0.001) with the price of the wines

a. Does the value of the correlation coefficient indicate that the relationship is weak, moderate, or strong?

b. What is the value of r²? Write a sentence that gives an interpretation of this value.