What’s the slope of -1,-5 and 4,-1

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x