When graphing, one always marks FIRST​

The y-intercept on the y-axis

Step-by-step explanation:

The y-intercept is where you start graphing. That's why it's important to find that first.

Hope this helps!!

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 %