This math topic focuses on identifying the x-coordinate to complete the coordinates of points plotted on a Cartesian grid. The problems do not provide indicators to make the task straightforward; hence, it tests the ability to recognize and understand the positioning on a grid effectively. Each question provides a visual representation of a Cartesian plane with various points marked, and the student must analyze these to determine the correct x-coordinate values. This builds foundational skills in understanding and working with the Cartesian coordinate system.