Hopefully this will be a quick question. I've been learning Poison by Alice Cooper and up until now, i thought the song was in D minor. D minor is what key it seemed the song resolved around. However, i just looked up some sheet music and a power tab and they both have a flat symbol on the staff next to the time signature. This represents the key of F right? Can anyone tell me what key this song is in please? Thanks
One flat can represent F major and D minor. D minor is the relative minor or F major, meaning that it contains they contain the same notes, but resolve to a different note.

The song is clearly minor, so D minor would be the correct choice.
O yea i forgot about relative minors lol. I didn't even consider that. Thanks for the help Bangoodcharlotte