a. Increasing or decreasing or neither or both increasing and decreasing. b. Use "change in input" & "the change in output "calculations to determine the slope between each consecutive pair of data points for each table to determine if the data would: form concave up, concave down or linear graphs. SI decre X y X y X y 2 -4 2 4 2 DNE -40 4 -4 4 16 4 8 -4 6 36 -80 -120 8 16 -4 8 64 16 -140