\[y = - \frac{1}{3}x\]
\[y(3) = - \frac{3}{3} = - 1\ \ \]
\[y\left( \frac{1}{3} \right) = - \frac{1}{3} \cdot \frac{1}{3} = - \frac{1}{9}\text{\ \ }\]
\[y( - 6) = \frac{6}{3} = 2\]
\[y\left( \frac{3}{2} \right) = - \frac{3}{3 \cdot 2} = - \frac{1}{2} = - 0,5\]