Answer:
B
Explanation:
we need to look at the y-intercept (the y value when x=0).
we need equating with +2 and +4 at the end.
that eliminates A and C, leaving B and D as potential right answer.
but then we see that the y-intercept "+2" must be in an equation for x <= 0, because that line with +2 intercept only covers negative x.
so, B is correct.