Chapter 1 section 4 task 29 TRANSPORTATION COST. A bus company has adapted the following pricing policy for groups that wish to charter its buses. Groups containing no more than 40 people will be charged a fixed amount of $2400 (40 times 60). In groups containing between 40 and 80 people, everyone will play $60 minus 50 cents for each person in excess of 40. The company's lowest fare of $40 per person will be offered to groups that have 80 members or more. Express the bus company's revenue as a function of the size of the group. Draw a graph. X- amount of people 2400 if R(x)= { x(80-1/2x) if 40x if 1≤x≤40 40<x<80 x≥80 I II III x(80-1/2x) is a quadratic function so X1=0 X2=160 a= -1/2 is negative so graph will be open downward