One hour after departure, an airplane is 2,178 kilometers away from its destination. Three hours after departure, the airplane is 934 kilometers from its destination. If the airplane continues to fly at the same rate toward its destination, which function correctly models the relationship between the distance in kilometers from the airplane’s destination, f(x) ,and the number of hours that have passed since departure, x? f(x)=-622x f(x)=-622x+934 f(x)=-622x+2,178 f(x)=-622x+2,800