Yes!
yes maybe as a title
Graphing "He graphs the answer carefully because he doesn't want to put the points in the wrong quadrant again."
Essay is classified as personal essay because one put some personal statements in it, I think.
on top
yes
If you are writing something else and referring to an essay you have written, you would put the title of that essay in quotation marks, but the title at the top of your essay (like the title of any document) should not have quotation marks.
no
The information in the essay, as in the words and the content you put into it
Please lengthen your essay.
A research essay aims to investigate and analyze a topic thoroughly by gathering and evaluating relevant information from various sources. It demonstrates the writer's ability to critically examine a subject, present evidence-based arguments, and contribute to the existing body of knowledge on the topic.
because she was fat