A9 hits the flop but I face a donk bet?

[HoldEmNewby]

No real read on villain. Should I have raise or folded the flop?

Party Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
5 players
Converter (http://www.neildewhurst.com/hand-converter)

Stack sizes:
UTG: $20.10
CO: $53.52
Hero: $44.90
SB: $18.90
BB: $20.78

Pre-flop: (5 players) Hero is Button with 9/images/graemlins/spade.gif A/images/graemlins/heart.gif
UTG, folds, CO (poster) checks, <font color="#cc0000">Hero raises to $1</font>, SB folds, BB calls, CO folds.

Flop: T/images/graemlins/heart.gif A/images/graemlins/club.gif K/images/graemlins/spade.gif ($2.35, 2 players)
<font color="#cc0000">BB bets $1.5</font>, Hero calls.

Turn: K/images/graemlins/diamond.gif ($5.35, 2 players)
<font color="#cc0000">BB bets $3</font>, Hero folds.
Uncalled bets: $3 returned to BB.

Results:
Final pot: $5.35

[redCashion]

I don't mind this line, I think the flop call is read dependant. But against someone who likes to mix it up, I'll call there and see what develops on the turn. You are hoping for a turn check, and then you can check behind so that you can re-evaluate on the river. Given the turn card and bet, it's an easy fold.

[Esection]

with an easily dominated hand like A9 here, sometimes i like to raise this flop bet for information. i would raise to between 4 and 5.

then turn is standard, but the flop raise will give you more info. also, you have position here so use it. raising flop can give you momentum in the hand, and give you the option of a free card.

[eigenvalue]

Another well played hand.