How do I find slope Intercept form

y=mx+b

m is the slope: take two points on the line find the slope using the slope formula which I cannot figure out how to type

b is the y intercept, where the line crosses the y axis and x = 0

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 %