A slight bend going back but it will naturally straighten out at the top of your swing at the end of your shoulder turn.
yea try to keep it straight through most of the swing. this will help a lot with turn also if you keep it straight
well if your a right handed golfer you should keep you left arm straight and don’t try to hit the golf ball as hard as you can or else the ball will curve and make sure your legs are bent just a little bit.
i know this because my dad is a golfer and so am i and ever since my dad tought me it has always worked and make sure when you swing your clubs don’t bend because if they do that means you are to strong for them so if they bend by a new set of clubs.