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.
Sometimes girls are paid with âtrade,â which means they get some free clothes, but no money. Itâs not unheard of for girls with smaller agencies to not get paid for jobs at all. Models in need of cash can borrow money against their future earnings from their agencyâand pay a high fee for the privilege. There is no such thing as a model union: Models are generally young and easy to take advantage of, and trust their agencies to get them work and pay them.