Line graphs show trends or relationships. Bar graphs compare separate items. Pie charts show different values as part of a whole. Illustrations include photographs and line drawings. Chart is a catch-all term for many kinds of visual aids.
Charts represent visually the organization of something such as a process or corporation.
You prepare to write a technical research paper the same way you would prepare for a general research paper. Detailed guidelines for preparation of a research paper appear earlier in this guidebook. However, as noted above, the organization of the document is somewhat different. References in a research paper also differ in some ways. American Institute of Physics.