So let me draw that. So we care about x equals four. As x equals four from below, so when x equals three, we're here where f of three is negative two. f of 3.5 seems to be right over here. f of 3.9 seems to be right over here. f of 3.999, we're getting closer and closer to our function equaling negative five. So this, the limit as we approach four from below, this one-sided limit from the left, we could say, this is going to be equal to negative five.