Which of the following relations is not a function?

a. {(2, 6), (- 4, 0), (2, 2), (3, 5)}
b. {(0, 0), (10, 4), (- 8, -5), (1, 1)}
c. {(12, 0), (- 4, 6), (2, 3), (6, 6)}
d. {(1, - 6), (9, 5), (7, 7), (5, 3)}

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]

What is the value of x in the this question ?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?