This power point allows for students to investigate the relationship between the slope of two lines and their classification as parallel or perpendicular. The first few slides have examples of lines graphed on the coordinate plane. Students will need to write the equations for these lines, in slope-intercept form, and then formulate a rule for determining whether two lines are parallel or perpendicular. You may choose to have students copy the rules straight from the power point, or have them write it in their own words. After these rules have been established, I have provided three examples where students will use this knowledge to write equations of new lines given a point and an equation of a line that it is parallel or perpendicular to. The last example, gives students three lines and they must determine which lines, if any, are parallel or perpendicular.
This power point can be used in conjunction with my foldable, which can be found here: