The first one, because you input the numbers into the equations to find your answer x numbers in the x variable and y numbers in the y variable. For example, -6=4(-1)-2 you get -6=-4-2 which is -6=-6 and that checks out for the rest of the numbers so the equation for set A is y = 4x - 2. You do the same for set B and you get y = x + 4.
