My understanding is Mormons hold to something similar to libertarian free will, the belief that a person’s choices are free from the determination or constraints of human nature and free from any predetermination by God.
Since I don’t understand the position very well, perhaps a brief explanation of the view would be helpful to me, but primarily this question is concerned with what case can be made from the Bible for the LDS view from Scripture (whether the Bible or other LDS Scriptures).