This math topic focuses on understanding the concept of slopes and perpendicular lines in the context of line equations. The main skill practiced is determining the equation of a line in standard form that is perpendicular to another given line depicted graphically. Students must analyze graphs, calculate the negative reciprocal of the line's slope (since perpendicular slopes are negative reciprocals of each other), and then format their answer in standard form. The problems progressively challenge the student to apply these skills across various line scenarios, enhancing their comprehension of line relationships and equation formulation.