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What does a bias value help with in a neural network?

Answer and explanation

Correct answer: In adjusting the decision boundary

In a neural network, a bias is a learnable constant added to the weighted sum before activation: z = w₁x₁ + w₂x₂ + b. Changing b shifts the value at which a neuron activates, so the model can move its decision boundary and fit data more flexibly. Choosing an activation function, initializing weights, and setting the learning rate are separate tasks; therefore option A is correct.

Related tags

Bias ValueNeural NetworksDecision BoundaryDeep LearningUnit 6: Understanding Neural NetworksUnit 6 Understanding Neural NetworksPart B: Subject Specific SkillsPart B Subject Specific Skills

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