This activity is intended to supplement Algebra I, Chapter 4, Lesson 3.
Problem 1 – Coordinates of Points
Complete the sentences by writing positive or negative.
Problem 2 – Lines, Equations, and Slopes
9. When dragging the line itself, what is changing in the equation?
Problem 3 – Slopes of Parallel and Perpendicular Lines
11. What can you say about the slopes of two parallel lines?
Open the Cabri Jr. file PERPENDI. Again drag the lines to investigate the relationship between the slopes.
12. What can you say about the slopes of two perpendicular lines?
13. What do you observe about the product of the slopes?