I am trying to plot some data and I am at a loss Here's the data ID: Student 1, Student 2, Student 3, ... Score: 65, 75, 80 .... I create a line plot of student vs score I want to add an average line to that plot. Is there a way in the Edit Data box to create a second data set where the x-values are the Student ID range (say A1:E1) and they all use the same Y value (say B2 which would be the average value). OR Do I need to change the data to be ID: Student 1, Student 2, Student 3, ... Score: 65, 75, 80 .... Average: 73, 73,73 ... and prepare the plot that way with one line being student vs score and the other student versus average.