This is the lesson on discovering the relationship between parallel and perpendicular lines. The students draw conclusions from the activities and see that parallel lines have the same slope and perpendicular lines have negative reciprocal slopes.
20 verbal situations and their equation. Ss answer: what is the slope of the line and what does the slope represent in this context? (Way to do this activity: Have each situation on a sheet of paper spread out throughout the classroom. Give Ss answer sheet and have them rotate through.)