Jamie's goal is to walk five miles every day. He decides to take a walk one evening, and sets up a function, y=3.5x+2.6, to determine how many total miles he will have if he walks for x hours. What does the 2.6 in this function represent?
O the miles Jamie already walked that day
O the number of hours Jamie walks
O the total miles Jamie will walk that day
O the number of miles per hour that Jamie walks