Question: when using a line graph, why is it important to only graph 1-3 series of data? a. a line graph in microsoft excel will not allow you to graph more that 3 series of data. b. it will not show changes over time if you use more than 3 series of data. c. the lines are to thick to use more than 3 series. d. more than 3 series of data causes to many lines on the graph, which makes it confusing to read.