Eighteen (18) exercises from Cohen whose solutions are due:

1.4   Rectangular Coordinates, Visualizing Data, page 26:

3, 6, 11, 12a, 13b, 17, 19, 25, 27, 32

1.5   Graphs and Graphing Utilities, page 40:

3, 5, 7, 9, 11, 15, 17, 19