Jackknife Poker Trainee
Like many things in poker, it depends. I would be in favor of checking here for the following reasons. First, since you have no info on the opponent, you could check back here to try and start getting some info on him. Second, your hand is marginally strong so the usual play is to check back. Finally, if your opponent is a thinking reg so he may be trying to induce a bluff or could even check-raise bluff here. Why give him the opportunity? Also, the SPR here isn't right for you to try and build up the pot at the end. For your strength of hand checking down and losing the least if he has you beat is probably best.
On the other hand, the opponent could be checking AJ, KJ, J9, even JT or QJ with the flush draw hitting at the end. It would look to your opponent that you could have hit the flush draw or even 89. If he does have the five hands I mentioned then you need to bet here to push him off his hand. The betting amount would depend on the opponent, but a 3/4 to pot size bet would definetly make him think about folding. If he has the flush or straight him self then your boned and will likely face a raise. If that happens, easy fold! Hope this helps!