1. (difficult) One difficult thing about this section was that with all the talk of the function mapping the coordinate points in the relation, there was not a single graph given to illustrate the point. Therefore, I must assume that the actual graph matters very little to the purpose of the section. It would have been helpful in illustrating I think.
2. (reflective) It's pretty interesting that the number of sets from A to B is |B^A| = |B|^|A|. It's pretty cool that there is usually a way to calculate these things that would be insane to try and count from just writing down all the possibilities.
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