Ummm - on a general basis yes. The problem I have with this outlook is that you are giving yourself odds on the flop of making your hand by the river; i.e. it assumes that you will get a free card on the turn, which we know doesn't always happen. If you have position and are confident that everyone will check to you on the turn than yes a call on the flop is a good play. If you are not so sure about that, than I think it is better to think of your odds on each street - e.g. you have a 1 to 10.5 chance to hit your 6 on the turn and if it doesn't hit you have a 1 to 10.5 chance to hit your 6 on the river as well.