freeCodeCamp/curriculum/challenges/english/11-machine-learning-with-python/tensorflow/neural-networks-activation-functions.english.md

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---
id: 5e8f2f13c4cdbe86b5c72d93
title: 'Neural Networks: Activation Functions'
challengeType: 11
isHidden: false
videoId: S45tqW6BqRs
---
## Description
<section id='description'>
</section>
## Tests
<section id='tests'>
```yml
question:
text: Which activation function switches values between -1 and 1?
answers:
- ReLU (Rectified Linear Unit)
- Tanh (Hyperbolic Tangent)
- Sigmoid
solution: 2
```
</section>