Can someone give me two equations an tell me which of the two would be steeper ?

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

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?