### Plotting in 2D

I have a question about the plots made by SageMath compared to other CAS.

Why does it make the straight line between the two ~~curves, it's ~~curves? It's like Sage is plotting the vertical asymptote without the user asking for it.

It does this to all the functions in the form of `1/x`

. I have not seen this type of plotting in Mathematica or Desmos, which made me wonder why the difference. Thanks.

```
sage: f(x) = x^2/(x+1)
sage: plot(f, (x,-3,2),figsize=10, ymax=8,ymin=-8)
```