Help messe

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

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?

How many solutions does the nonlinear system of equations graphed below have?