Second graph, showing the solution (2, -6) is the answer.
The horizontal line is showing the graph for the equation
y = -6
And the other line is showing the graph for the equation
4x + y = 2
If you put (2, -6) in above equation
4(2) + (-6) = 2
8 - 6 = 2
2 = 2
Which satisfies the equation.
