\[y = kx + b\]
\[(0;2):\]
\[2 = k \bullet 0 + b\]
\[b = 2 \Longrightarrow y = kx + 2.\]
\[(3;0):\]
\[0 = k \bullet 3 + 2\]
\[3k = - 2\]
\[k = - \frac{2}{3} \Longrightarrow y = - \frac{2}{3}x + 2.\]
\[Ответ:y = - \frac{2}{3}x + 2.\]