Aride at an amusement park has two options for cars, one that holds 6 passengers and one that h
ride designer wants to make sure that each run holds at least 12 passengers, which graph shows
the number of 6-passenger cars, x, and the number of 3-passenger cars y

In the set of ordered pairs {(-2, 0), (0, 6), (2, 12), (4, 18)}, the domain is the set of the first number in everypair (those are the x-coordinates): {-2, 0, 2, 4}. Therange is the set of the second number of all the pairs(those are the y-coordinates): {0, 6, 12, 18}.  There you go :)