____________denotes the number of samples to be taken to for updating the model parameters.BatchEpochLearning rateCost function

The term "Batch" denotes the number of samples to be taken for updating the model parameters.

Here's a step-by-step explanation:

1. In machine learning, a batch is a subset of the dataset. Instead of running the model on the entire dataset at once, you break the data into small batches.

2. This is done mainly for computational efficiency. If you have a large dataset, it might not fit into your machine's memory all at once. By breaking the data into batches, you ensure that you only need to have one batch in memory at a time.

3. The number of samples in a batch, also known as batch size, can be a crucial parameter in the training of machine learning models. It can affect both the speed of training and the performance of the model.

4. During each iteration (or epoch), the model parameters are updated based on the error it made on the current batch of samples. The learning rate determines the size of these updates.

5. The cost function is used to measure how well the model is doing. It calculates the difference between the model's predictions and the actual values for the samples in the current batch. This difference, or error, is what the model tries to minimize during training.