1. The problem is to plot a point where the x-coordinate is 1 and the y-coordinate is 2.50. 2. To plot a point on a Cartesian plane, you locate the x-value on the horizontal axis and the y-value on the vertical axis. 3. Here, the x-value is 1, so move 1 unit to the right from the origin (0,0) along the x-axis. 4. The y-value is 2.50, so from the point (1,0), move 2.50 units up along the y-axis. 5. Mark the point at coordinates (1, 2.50). 6. This point represents the location where x=1 and y=2.50 on the graph.