Which equation represents a line that is parallel to the line whose equation is y=x+4?

Answer 1

Parallel lines have the same slope. Just like we don't call you 1 Erykah because that would silly, saying "Erykah" implies there's one of you.

Whichever equation has a slope of 1 once you get it into slope-intercept form is your answer, like y = x + 200 or similar.