A runner runs from a parking lot and then runs laps around a field. The number of steps, y, she has taken after x laps can be modeled by the equation y = 120 x + 150. What does the number 150 represent?
The number of steps she takes from the parking lot
to the field
The number of laps the runner takes around the
field
The total number of steps the runner takes
The number of steps she takes on each lap