Day 10 in Mat225

Last time: Problem review from 1.4, 1.5, and 1.7

Today:

Announcements:
- If you are planning on going to the picnic, please sign the sheet. And please do let me know if you need a ride on the van, so that I can get you a pillow and take drink orders....
- Problem Collection opportunity, problems 1.4, 1.5, 1.7.
Questions/Comments on old stuff?
Section 1.8:
- section 1.8 summary
- Some xlispstat code, illustrating the special matrix transformations of projection, shear, scaling, and rotation.
- Problems, pp. 79-82:
  - #2
  - #16
  - #18
  - #26

Next time: 2.1 -- matrix operations

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