9) A(2; 0), В(-4; 0), C (1; 1)

Here's how to plot these points:

• Point A (2; 0): Start at the origin. Move 2 units to the right on the x-axis. Since the y-coordinate is 0, the point stays on the x-axis.
• Point B (-4; 0): From the origin, move 4 units to the left on the x-axis. The point will be on the x-axis.
• Point C (1; 1): From the origin, move 1 unit to the right on the x-axis and 1 unit up on the y-axis.

You can mark these locations on the provided coordinate plane.