How many of the given polymers are homopolymers?
Polyethylene, Dacron, Buna rubber, Nylon-6,6

Explanation

To determine how many of the given polymers are homopolymers, we need to analyze each polymer based on its composition and the types of monomers used to form them.

### Step-by-Step Solution:

1. **Understanding Homopolymers**:
- Homopolymers are polymers that are made from only one type of monomeric unit. This means they consist of repeating units of a single type of monomer.

2. **Analyzing Polyethylene**:
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