This math topic focuses on identifying y-values of points on a Cartesian grid. It hones the skill of reading a Cartesian grid and pinpointing y-coordinates specifically, which contributes to a foundational understanding of the Cartesian coordinate system. Each question presents multiple points on a grid, and students are tasked with determining the y-value for each. The problems advance students' spatial visualization and coordinate identification skills, essential for further studies in mathematics and related fields.