Bus and subway ridership for the summer months in London, England, is believed to be tied heavily to the number of tourists visiting the city During the past 12 years, the following data have been obtained: Year Number of Tourists (in millions) 7 2 64 14 15 16 Ridership (in millions) 12 3 4 5 67 89 10 11 12 12 14 20 15 7 1.5 1.0 1.3 1.6 24 2.7 2.3 2.0 28 45 33 1.7 This exercise contains only parts b, c, d, e, and f b) The least-squares regression equation that shows the best relationship between ridership and the number of tourists is (round your responses to three decimal places): where y Dependent Variable and x Independent Variable