Apolline is mowing lawns for a summer job. For every mowing job, she charges an initial fee plus a constant fee for each hour of work. Her fee for a 5-hour job, for instance, is $42. Her fee for a 3-hour job is $28. Let y represent Apolline's fee (in dollars) for a single job that took x hours for her to complete.
Which of the following information about the graph of the relationship is given?