write the in independent variable and the dependent and an equation pls help I will cash app you 20$

1) To fix a car, Fix-it Auto charges a base fee of $20 plus $40 per hour.


2) The cost of a banquet at Jean’s Banquet Hall is $450 for the rental of the hall and $15 per guest.


3) An author earns a royalty of $1.25 for each book sold.


4) Marie has $500 in her bank account. Each week she plans to deposit $20.


5) Paul has $1500 in his bank account. Each week he withdraws $100.


6) The cost to cut a lawn is a flat fee of $5 plus $6.50 per hour.


7) The charge to walk a dog is $10/hour.


8) Hans Building supplies sells sand for $19/ton plus $25 for delivery.