Can someone help ASAP ill give you good rating

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

Ineed in figuring out this problem.

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)