Write an equation for the line of best fit and then predict how much money travelers will spend in 2008. a. y = 2 x 380; travelers will spend about $410 billion in the year 2008. b. y = 2 x 320; travelers will spend about $350 billion in the year 2008. c. y = 20 x 320; travelers will spend about $620 billion in the year 2008. d. y = 20 x 380; travelers will spend about $680 billion in the year 2008.