# Bias (machine learning)

> An intercept or offset from an origin. Bias is a parameter in machine learning models, which is symbolized by either of the following:

An intercept or offset from an origin. Bias is a parameter in machine learning models, which is symbolized by either of the following:

- $b$
- $w_0$

For example, bias is the $b$ in the following formula:

$$
y' = b + w_1 x_1 + w_2 x_2 + \cdots + w_n x_n
$$

In a simple two-dimensional line, bias just means "y-intercept."[^1]

## Footnotes

[^1]: https://developers.google.com/machine-learning/glossary#bias