This math topic involves identifying the slopes of lines that are perpendicular to given slopes. It focuses on converting slopes given as fractions into their decimal forms and then determining the perpendicular slope. Each problem presents a slope and offers multiple choice options for the correct perpendicular slope based on the negative reciprocal relationship between perpendicular slopes. The exercises cover various slopes, requiring students to apply concepts of negative reciprocals and convert fractional slopes into decimal equivalents for comparison.