Answer correctly pls lol kk

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?

How do u write a function for the reflection across the y axis