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.

Dereck works for long hours on his computer.  he frequently experiences physical strain by the end of the day because he does not follow an important rule of ergonomics with respect to the use of keyboards.  which of the following actions of dereck could lead to physical strain? a.  placing the keyboard exactly in front of him while typingb.  keeping hands and wrists straight while typingc.  using wrist pads throughout the dayd.  pounding at the keys on the keyboard while typinge.  resting his hands on the keyboard when he is not typing