Where does this formula come from ? Could anyone help me about the math behind it ?

```
- W[0,0] / W[0,1] * x_line + -b[0,0] / W[0,1]
```

Where does this formula come from ? Could anyone help me about the math behind it ?

```
- W[0,0] / W[0,1] * x_line + -b[0,0] / W[0,1]
```

It’s a bit of algebra that lets you plot two points that are on the decision boundary, then draw a line between them.

What is the name of the formula, then ? Could you give me some references ?

It doesn’t have a special name, it’s just some algebra based on the equation of a line that passes through two points.