Hey there!
We can see that the y-intercept is 6, or (0, 6), because when x is equal to 0, that is the y-intercept.
Hope it helps and have a great day! Let me know if you need more help!
A) Yes, the two events are independent because P(NF|PB) = P(NF).
sin(π/6) is independent of x, so

My advice is don't smoke and make sure you don't keep the two close together. Hope this helped,