The final step in the scientific method is the conclusion. This is a summary of the experiment's results, and how those results match up to your hypothesis.
You have two options for your conclusions: based on your results, either you can reject the hypothesis, or you can not reject the hypothesis. This is an important point. You can not PROVE the hypothesis with a single experiment, because there is a chance that you made an error somewhere along the way. What you can say is that your results SUPPORT the original hypothesis.
