Is the following relation a function?
X y
1-2
1-3
2 1
13-2
Yes
NO

Step-by-step explanation:

No. More than 1 element in the domain (1 and 3) have the same image in the co-domain. (-2)

answer:      

step-by-step explanation:

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%