\[f(x) = 3 - \frac{1}{4}x\]
\[f(0) = 3;\ \ \ \ \]
\[С\ осью\ y \Longrightarrow (0;3).\]
\[3 - \frac{1}{4}x = 0\]
\[\frac{1}{4}x = 3\]
\[x = 12\]
\[С\ осью\ x \Longrightarrow (12;0).\]
\[Ответ:(12;0);\ \ (0;3).\]