The variables x and y are proportional. Use the values to find the constant of proportionality. Then write an equation that relates x and y . Write any fractions in simplest form. When y=20 , x=12 .

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?