## Calculus 10th Edition

As $f(x)$ approaches $x=-2$ from the left, it approaches $-\infty.$ As $f(x)$ approaches $x=-2$ from the right, it approaches $+\infty.$
To approach $+\infty$ the function should increase in the positive (upwards) direction, while to approach $-\infty$, the function should increase in the negative (downwards) direction.