Derek is renting a van from Abby's Autos.  He will be charged an initial fee to rent the van and an additional amount that depends on how far he drives it.  This situation can be modeled  as a linear relationship.  What does the y-intercept of the line tell you about the situation?

Emmett is planning a party at an escape room. The escape room will charge Emmett a booking fee and an additional cost per person attending the party.This situation can be modeled as a linear relationship.  What does the slope of the line tell you about the situation?