nick walks up 5 stairs in 6 seconds. edwin walks down 2 stairs per second. jeff walks up 7 stairs in 6 seconds. simon walks down 3 stairs per second. if we graph each of these relationships with the number of stairs traveled (y-axis) with respect to time in seconds (x-axis), we get the lines shown in the graph. identify and drag the name of each person to the line that represents his situation.