Determine whether the following graph represents a function

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost