\[y = - \frac{1}{3}x + 1\]
| \[x\] | \[0\] | \[3\] | 
|---|---|---|
| \[y\] | \[1\] | \[0\] | 
\[y = - \frac{1}{3}x - 2\]
| \[x\] | \[0\] | \[3\] | 
|---|---|---|
| \[y\] | \[- 2\] | \[- 3\] | 
\[y = - \frac{1}{3}x\]
| \[x\] | \[0\] | \[3\] | 
|---|---|---|
| \[y\] | \[0\] | \[- 1\] | 

\[k_{1} = k_{2} = k_{3} \Longrightarrow прямые\ \]
\[параллельны.\]