Identify the type of function represented by

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Ineed to know the answer to this algebra question.

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)