What is the mean and median of 2,5,9,11,17,19

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Which graph represents the parent function of y=(x+2)(x-2)