x = A sin â¡ ( Ï [ t â K ] ) + b , {\displaystyle x=A\sin(\omega [t-K])+b\ ,}. 1  A is the amplitude (or peak amplitude), 2  x is the oscillating variable, 3  Ï is angular frequency, 4  t is time, 5  K and b are arbitrary constants representing time and displacement offsets respectively.
Modeling agency. A modeling agency is a company that represents fashion models, to work for the fashion industry. These agencies earn their income via commission, usually from the deal they make with the model and or the head agency. The top agencies work with big-budget advertising agencies and fashion designers.
Models are becoming such business powerhouses that they command huge salaries for just a single campaign because of their personal branding. Kendall Jenner, the half sister of reality-TV star Kim Kardashian, has become one the highest-paid models in just one year, thanks to her millions of followers on social media. Brands know that if she puts a picture on Instagram or on Twitter, she could get the label more exposure than traditional adverts. Meanwhile, modelling for Victoria's Secret gives models a massive boost to their careers and allows them to command some of the highest pay in the fashion world.