Use the table to answer the question.

Buses Number of People
0 0
1 35
2 70
3 105
4 140
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.

The constant of proportionality appears in the table when the number of people is proportional to the number of buses. Looking at the table, we can see that as the number of buses increases by 1, the number of people also increases by 35. Therefore, the constant of proportionality is (1, 35).