Five less than a number is more than twenty

What is a graph with a never ending line called?

Can someone me do math because i am having a breakdown rn because i don’t get it

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)