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.
Most actors and models, including those just beginning their careers, either earn by the hour or per project. These projects can include print advertisements, television commercials, magazine layouts and movies. Average starting model salaries were $41,000 as of 2013, according to the job site Indeed. Actors earned starting salaries of $38,000 annually. Those aspiring to both of these occupations usually train in model and acting schools.