[Michael Reach]

Huh - I haven't done this problem yet, but this is really interesting. I had thought the answer to this question would be, like, 1, but now I see that the first step is likely to ruin the advantage that the linear regression gave you. The PLA isn't initially very subtle; the weights eventually get big and you have to wait till the size of the adjustments becomes small relative to the weights for the fine tuning.