Which of the following sets of points is a direct variation? (0, 0); (2, 4); (5, 15) (0, 0); (-1, -2); (1, 2) (3, 6); (-2, 4); (-1, 2) (0, 5); (1, 6); (2, 7)

(0, 0); (-1, -2); (1, 2)  I'm not very good at math but, I hope it helped!!

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560