The relation defined by the set of ordered pairs (1,2), (2,3), (4,5), (6,7), (1,8), (2,6), (3,7) is not a function. Which of the ordered pairs listed, if omitted (removed) from this relation, will make the resulting set a function? Why?

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

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