What is the answer?
could you also me with the equation?

Which one ? is the answer and how to find this answer

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?

Graph the system of equations. { x-y=6 4x+y=4use the line tool to graph the lines. where do i put each point?