Answer the question on the basis of the following five data sets, wherein it is assumed that the variable shown on the left is the independent variable and the one on the right is the dependent variable. assume in graphing these data that the independent variable is shown on the horizontal axis and the dependent variable on the vertical axis. (1) (2) (3) (4) (5) j k l m n p r t u v 0 10 0 -15 100 40 0 -15 0 0 40 20 30 -5 80 50 20 -25 5 10 80 30 60 5 60 60 40 -35 10 20 120 40 90 15 40 70 60 -45 15 30 160 50 120 25 20 80 80 -55 20 40 200 60 150 35 0 90 100 -65 25 50 refer to the data sets. the variables are directly related in a. data sets 1, 2, and 3 only. b. all five data sets. c. data sets 1, 2, and 5 only. d. none of the data sets.