9.42 3/8% please please give me a explanation

Create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Which graph represents the equation y =4x