A function $f$ and value $a$ are given. Approximate the limit of the difference quotient,
$\lim\limits_{h \to 0} \frac{f(a+h) - f(a)}{h},$ using $h = \pm 0.1, \pm 0.01$.

$f(x) = \frac{6}{x + 2}, \qquad a = 1$

When $h = 0.1$, $\frac{f(a+h) - f(a)}{h}$ =
When $h = -0.1$, $\frac{f(a+h) - f(a)}{h}$ =

When $h = 0.01$, $\frac{f(a+h) - f(a)}{h}$ =
When $h = -0.01$, $\frac{f(a+h) - f(a)}{h}$ =