Murphy charges a $15 service fee and $10 per hour to rake leaves in a yard. The equation y = 5x + 25 represents the amount Nicki charges in dollars for hours of leaf raking per yard. Which statement is true?

Nicki charges $10 more than Murphy to rake leaves in a yard for 2 hours.
Nicki charges $10 more than Murphy to rake leaves in a yard for 2 hours.

Murphy charges $10 more than Nicki to rake leaves in a yard for 4 hours.
Murphy charges $10 more than Nicki to rake leaves in a yard for 4 hours.

Nicki always charges more per yard than Murphy, regardless of how many hours it takes.
Nicki always charges more per yard than Murphy, regardless of how many hours it takes.

Murphy always charges more per yard than Nicki, regardless of how many hours it takes.

Nicki charges $10 more than Murphy to rake leaves in a yard for 2 hours.