Solve the equation for y

Which value is not a solution of 8x^3 – 1 = 0

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?

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.