\[y = kx + b;\ \ E(0; - 36);\ \ F(4;0).\]
\[E(0;\ - 36):\]
\[- 36 = 0 \cdot k + b\]
\[b = - 36.\]
\[F(4;0);\ \ b = - 36:\]
\[0 = 4k - 36\]
\[4k = 36\]
\[k = 9.\]
\[Ответ:k = 9;\ \ b = - 36.\]