Can someone please tell meh whether i did these correctly or not?

The parabola y = x² - 4 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?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.