algebra, 1/25

a-c block:  pg. 215, # 30-35 (put in function form),
                               # 41-51 ( make table and graph)
                              # 60,61
d-block:   pg. 230 , #20-37 ( use formula (y2-y1)/(x2-x1) for all of them )
                              #38-41