Angelina’s family planned to rent a vacation home in the Poconos. The overall cost of the vacation rental includes a one-time cleaning fee plus a nightly rate. For 3 nights it would cost a total of $510. For 5 nights it would cost a total of $800.Let x represent the number of nights the house would be rented and y represent the total cost. If Angelina were to graph a line to show the nightly rate, what does the slope of the line represent? *