The math topic in question focuses on identifying line equations that have slopes perpendicular to given equations. Students are presented with several line equations and must select from multiple possible answer choices which corresponding line equation possesses a slope that is perpendicular to the original. This practice encompasses understanding the relationship between slopes and perpendicular lines within the context of linear equations in slope-intercept form. The entire worksheet is a part of a broader introductory unit on slopes and perpendiculars.