What is r2 for the regression in given problem explain its, Ask an Expert

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What is r² for the regression in given problem? Explain its meaning

Problem :-
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 ($ millions)
Year	Credit card	Online debit card
2002	156	211
2003	204	280
2004	279	386
2005	472	551
2006	822	684
2007	1,213	905

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Statistics and Probability, Statistics

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