I would like to learn more about slope and y intercept from. Here are two problems I would like to know if I understand slope intercept form

1. A streaming company charges $60 for it's product. In order to play this game, you are charged a $15 monthly fee. If you have been streaming for 5 months in total, what is the amount you have paid so far.

2.Bob has decided to sign his family of four up for year round passes to a local zoo. The initial price up front required by the contract is $100 per person. Each month after the first, Bob must pay $20 per person. If Bob signs up with his wife and two teenagers, how much will it cost him to sign up for one year?

What would the slope represent for both problems? What about the y-intercept?