Which mapping diagram represents a function from x → y?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

An archaeologist in turkey discovers a spear head that contains 53% of its original amount of c-14. find the age of the spear head to the nearest year. (5250 isn’t right)

For the function f(x)=1/x-2 +5 notice that a=1, h=2, k=5 what are the vertical and horizontal asymoptote