Fran, a factory worker, earns $480 per week for working 40 hours. She will earn $18 for every hour she works over 40 hours. Factory workers can work a maximum of 60 hours in a week. The graph illustrates this situation.

Complete the statements below about the data by selecting the correct choice from each drop-down menu.

The initial value, or y-intercept, of the linear function is
and represents
.
The rate of change is
and represents
.

The initial value, or y-intercept, of the linear function is -$. The negative sign indicates that Fran starts with debt or owes money.

The rate of change is $ per hour and represents Fran's additional earnings for each hour worked beyond 40 hours.