What is the function of a hypothesis in the scientific inquiry process?

The hypothesis is an educated guess that is made before the experiment is done. 

Hoped this helped.

~Bob Ross®
 

The hypothesis is a educated guess before the experiment is done

Ineed to know the options

Betray, destroy, and obey do not need to be changed to add the suffix -ed, because the "y" at the end of each word is preceded by a vowel  (so  they would be spelled  "betrayed," "destroyed," and "obeyed").

but hurry is different; it has to  be spelled "hurried" because the "y" at the end of "hurry" is preceded by a consonant.