Question

Would a person traveling from denver, colorado, to anchorage, alaska, set her watch forward or backward, and by how many hours

Answer 1

Set it back--The person would set their watch back 2 hours. 

Alaska is in -9 time zone and Colorado is in -7 time zone. Time zone is set from the Prime Meridian and is referred to as Greenwich Meantime. All zones are either behind or ahead of that time noting a - or + in time.