How does a scientist form a hypothesis

The way scientists form a hypothesis is there is something called the scientific method. You established your question or problem first. Then you research it. You take your hypothesis, theory, or prediction of what is going to happen from your research.

Here is your answer:

Hypothesis always starts with question scientist want to find out what the answer is so they conduct an expierament so they make a guess about what the answer will be which is your hypothesis!