Determine if each equation represents a direct variation. Select yes or no. a. y = 4x + 1
b. y = 7.5x

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Find x & pleeeeaaaassseeee me !

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem