The following data show the demand for an airline ticket dependent on the price of this ticket. 
For the assumed cubic and log-log regression models,Demand = β0 + β1Price + β2Price2 + β3Price3 + ε and ln(Demand) = β0 + β1ln(Price) + ε,the following regression results are available. 
Which of the following is the percentage of variations in ln(Demand) explained by the log-log regression equation?
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The formal approval procedure of treaties, constitutional amendments, or legislative acts, often requiring a majority vote or other predefined criteria.
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The state of being equal, especially in status, rights, and opportunities.
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Fundamental beliefs or standards that guide individual or societal decisions and policies in the political arena.
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The rightful status, accepted and recognized by the public or law, that gives a government or ruling body authority over its subjects.
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