Kitty wants to attend a wedding with her friends and relatives, which will be held in another city. She thought to hire a bus for this journey. Kitty is considering using one of two bus services. Yellow Bus Company will charge her $450 for reservation, plus$30 per seat. Bubbles Bus Service will charge $250 for a reservation and $40 per seat. Help her to make the best decision. She wants to use Yellow Bus Company. How many relatives would have to come to make Yellow Bus Company a better deal than Bubbles Bus Service?