The IQR is used as a measure of variation when the distribution is .

Alarge rectangle is divided into four smaller rectangles.

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 are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2