The following data represent the size of a car's engine (in liters) versus its miles per gallon in the city for various 2008 domestic automobiles. Are engine displacement and fuel economy negatively associated at the α = 0.05 level of significance?

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City Miles per Gallon, y Engine Displacement (in liters), x Car Acura RL 3.5 16 Buick LaCrosse 3.8 17 Cadillac DTS 4.6 15 Chevrolet Cobalt 2.2 24 Chevrolet Impala 3.5 18 Chevrolet Malibu 2.4 22 Chrysler Sebring 2.4 21 Dodge Magnum 2.7 18 Ford Taurus 3.5 18 Ford Focus 2.0 24 Ford Mustang 4.0 17 Lexus LS 460 4.6 16 Pontiac Grand Prix 3.8 18 Pontiac G5 2.2 24 Saturn Aura 2.4 22