3 The demand for cars General functional notation shows only that the variables are related: Qd=D(P,Y) A specific functional form shows the precise quantitative relationship: Examples: 1) Q°=D(P,Y)=60-10P+2Y 2) g-DP,Y)-02 0.3Y CHAPTER 1 The Science of Macroeconomics slide 16CHAPTER 1 The Science of Macroeconomics slide 16 ▪ General functional notation shows only that the variables are related: ( , ) d Q D P Y = ▪ A specific functional form shows the precise quantitative relationship: Examples: 1) ( , ) 60 10 2 = = − + d Q D P Y P Y = = 0.3 2) ( , ) d Y Q D P Y P 3 The demand for cars