daveMac
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 Apr 25 comment Calculating completed percentage of a jigsaw puzzle The answer/solution must be perceptually correct because the goal is to analyze the progress of a jigsaw puzzle and determine how much is completed. To a real person, you wouldn't count two halves of the puzzle that are fully assembled as having any more than one match left, though technically speaking, there are two. May 25 comment Finding out whether two line (segments) intersect That is very true about the need to check the y as well. (I think I just took that for granted.) May 25 comment Finding out whether two line (segments) intersect I think this is essentially what Thomas described at the end of his answer. May 25 comment Finding out whether two line (segments) intersect I updated my question to clarify that I am trying to figure out if the line "segments" intersect. May 24 comment Finding any point on a line if you know the slope and $y$-intercept. This explanation really helped me as well...I was torn on which answer to accept. Thanks for the effort. May 24 comment Finding any point on a line if you know the slope and $y$-intercept. Thanks Marvis...I'm a bit fuzzy on my algebra. That cleared it right up. May 24 comment Finding any point on a line if you know the slope and $y$-intercept. This is exactly what I was wondering, but I'm a little confused as to how 3x - 3 makes x = 1. Sorry for the ignorant question but could you clarify?