Let's try doing that with Desmos
Use Desmos to graph 𝑓𝑥=0.3𝑥3−2𝑥2+4.5𝑥−1.
The graph should look something like the graph shown below
A) 𝑓−16 
B) 𝑓−11 
𝑓𝑥
Let 𝑔𝑥=𝑥+1 for 𝑥>0