Consider the transfer function
\(G\left( s \right) = \frac{{1000\left( {s + 3} \right)}}{{s\left( {s + 30} \right)\left( {s + 300} \right)}}\)
In the asymptotic Bode magnitude plot at frequency 20 rad/s, the slope is1
-40 dB/decade
2
-20 dB/decade
3
+40 dB /decade
4
0 dB/decade