The point (2, 1) would partition the line segment BA into a 3:2 ratio. When partitioning a line segment, you must start from the first point B and make your way towards A. Since there is 9 spaces between B and A, you can count 3 from B, then 2 from A, 3 from B, then 2 more from A to get your point that partitions the directed line segment.
~Hope this helps!~
(Also I would like to add that the method used in this problem may not always be able to solve similar problems that may require a different approach.)
