A tour bus company is planning a trip through Utah’s national parks. The company plans to use 4 buses. Combined, the buses can fit up to 140 people. The table provided displays the number of people-to-bus ratio. At which ratio in the data table does the constant of proportionality appear? Write your answer as an ordered pair inside the parentheses provided.
buses: 0, 1, 2 ,3, 4 number of people: for 0, is 0, for 1 is 35, for 2 is 70, for 3 is 105 for 4 is 140