If you plug in (-4,4) into the equation, we have -3(-4) - 4 = 6
So do the math... -3*(-4) = 12 and 12 - 4 = 8.... so 8 = 6
8 does no equal 6 so it isn't the plot (-4,4)
If you plug in (-3,3) into the equation, we have -3(-3) - 3 = 6
So -3*(-3) = 9 and 9 - 3 = 6.... so 6 = 6
This plot works!
So your answer is (-3,3)
Hope this helps :)