Which set of ordered pairs does not represent a function? O {(7,5), (-6,0), (8,-9),(-1,-9)}
O {(0,–2), (3,9), (-5, -1),(-9,9)}
O{(-5,-4), (1, -1), (2,5), (3,5)}
O{(-9,9), (-6,0), (-9,8), (-1,-2)}

4

Step-by-step explanation:

Functions can not have two x-values. Number 4 has two -9's, therefore it is not a funtion.

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