Please help me i dont understand it and i dont know the answers

Step-by-step explanation:

a) y=

x=-1 ⇒ y=

x=1    ⇒  y=

x=2 ⇒   y=

x=4   ⇒  y=

b) =

so the blue one

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %