Question: For the data given below, regress one variable on the other. Is there an implication of causality, or are both variables affected by a third?

For the data given below, regress one variable on the other. Is there an implication of causality, or are both variables affected by a third?

Sample of Annual Transactions (S millions) Credit Card 156 204 279 472 822 1,213 Online Debit Card Year 2002 2003 2004 2005 2006 2007 211 280 386 551 684 905

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