21 trucks, each with a 2.5-ton payload, are needed to unload a freight train. c how many trucks, each with a 3.5-ton payload, would be needed to do the same job?

Suppose you are analyzing the relationship between time and distance given in a table,and there are 4 values for each quantity.you divide distance 2 minus distance 1 by time 2 minus time 1.you then divide distance 4 minus distance 3 by time 4 minus time 3 and get a different answer.what can you say about the relationship?