I'm working on something that says the following:
Source: http://www.inf.unibz.it/~zini/ML/slides/ml_2012_lab_05_solutions.pdf (solution 2)
I can't wrap my head around how they get that equation from that graph??
If the equation is:
X1 - X1A X2 - X2A --------- = ---------- X1B - X1A X2B - X2A
then for their answer to work the points would have to be:
(x1, x2) A = (0 , -1) B - (1 , 0)
which isn't true since the line crosses A axis at 1 and B axis at -1 (like they say).
How are they deriving that line equation from that given graph?