Answer
$-4,\ -2,\ -\displaystyle \frac{4}{3}$, $-1$, $-\displaystyle \frac{4}{5}$, $-\displaystyle \frac{2}{3}$
Work Step by Step
$f(1)=-\displaystyle \frac{4}{1}=-4$
$f(2)=-\displaystyle \frac{4}{2}=-2$
$f(3)=-\displaystyle \frac{4}{3}$
$f(4)=-\displaystyle \frac{4}{4}=-1$
$f(5)=-\displaystyle \frac{4}{5}$
$f(6)=-\displaystyle \frac{4}{6}=-\frac{2}{3}$