\[y = - \frac{x}{3} - 1\]
\[x = - 6:\]
\[y = - \frac{- 6}{3} - 1 = - ( - 2) - 1 =\]
\[= 2 - 1 = 1.\]
\[x = - 1:\]
\[y = - \frac{- 1}{3} - 1 = \frac{1}{3} - 1 =\]
\[= \frac{1}{3} - \frac{3}{3} = - \frac{2}{3}.\]
\[x = 1,5:\]
\[y = - \frac{1,5}{3} - 1 = - 0,5 - 1 = - 1,5.\]