This math topic focuses on finding the equations of lines in standard form that are perpendicular to a given slope. It involves understanding the relationship between perpendicular slopes and converting decimal slopes to the standard form equation of a line. Each problem presents a slope value, and students must select the correct line equation from multiple choices that is perpendicular to that slope. This is part of a broader unit on slopes and perpendicular lines, testing skills in manipulating line equations and understanding the geometric concept of perpendicularity.