The quantities z and y are proportional. 14 1.4
16 1.6
21 2.1
Find the constant of proportionality (r) in the equation y = ra.

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.

How to do this , and can some one explain

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*