The points to be plotted are (4.5, 3) and (-2, -1). (4.5, 3) is located 4.5 units to the right of the origin on the x-axis and 3 units up from the origin on the y-axis. (-2, -1) is located 2 units to the left of the origin on the x-axis and 1 unit down from the origin on the y-axis.