Own-Price Changes a X1(p1,p2,y)= y a+b p1 and x2(p1,p,v-b y a+b p2 Notice that x, *does not vary with p, so the p, price offer curve is flat and the ordinary demand curve for commodity 1 is a rectangular hyperbolaOwn-Price Changes x p p y a a b y p 1 1 2 1 * ( , , ) = +  x p p y b a b y p 2 1 2 2 * ( , , ) = . +  and Notice that x2 * does not vary with p1 so the p1 price offer curve is flat and the ordinary demand curve for commodity 1 is a rectangular hyperbola