Hiya Roberta,
To me, your essay sounds like a 5 sentences single paragraph text. And I would agree with the adopted presentation : no 'carriage returns' between the sentences.
I'm not a native speaker but I would think the rules are more or less the same as in my mother tongue : you would start a new paragraph whenever you feel whatever you're going to say next is loosely connected or no longer connected to the previous sentence.
So for instance what you wrote above could be interpreted as an 'introduction' paragraph in a longer essay. Then you'd probably start talking about Elvis' childhood and you'd be saying for instance 'Elvis was born and raised in Memphis, Tennesse'. But since you'd then begin to talk specifically about his childhood, then you'd probably want to make it a new paragraph altogether.
How does all this sound ? Also note I tried to pay specific attention to how I 'paragraphed' this note...
Waïti.