algebra, 1/17

A-C Block:  practice sheet 4.2B, #1-31 (odds)
                    practice sheet 4.3B, #1-27 (odds)

D-Block:    practice sheet 4.4B, #1-13 ( m = rise/run)
                                                  , #14-32  (m=(y2-y1)/(x2-x1))