Sam climbs a rate of 19 meters per hour and Allie climbs at a rate of 22 meters per hour they agree to continue to climb up the rock face for another 1/2 hour than Allie continue to climb 1/2 hour. What rate must Sam climb in the last 1/2 hour to reach the same height as Allie

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?