a gd= f(p) gd stands for the quantity demanded p stands for the unit price fo is notational shorthand for saying 'depends upon EXample: Cycle Safety-HeImet a a company manufactures and sells a particular type of bicycle safety-helmet. The demand for the company,s product is given by qd=900-30p (9.2) where p is in fs and gd is in units of output per time period❑ qd = f(p) ◼ qd stands for the quantity demanded ; ◼ p stands for the unit price ; ◼ f() is notational shorthand for saying 'depends upon ‘ ◼ Example : Cycle Safety-Helmet ❑ A company manufactures and sells a particular type of bicycle safety-helmet. The demand for the company's product is given by : ◼ qd = 900 - 30p — — ( 9.2 ) ◼ where p is in £'s and qd is in units of output per time period