The cost of renting a moving truck includes a fixed initial fee of $45, and a cost of $0.65 per mile driven. Peggy rented a truck when she got a new job and had to move. She ended up paying $204. (You can deliver the truck in the city of destination)

1. Find a linear function that gives the total cost of renting a truck and diving it for x miles.
2. Use your function to find how many miles did Peggy drive the truck.