Slopes and Parallel and Perpendicular Lines
In this topic, you will be exploring parallel and perpendicular lines. You will learn how to determine if lines are parallel, perpendicular or neither by looking at their slopes both algebraically and graphically.
Essential Questions
- How can you use a formula to determine the slope of a line?
- How can you use slope to determine if lines are parallel, perpendicular or neither?
Warm-Up
Pretend that you are training to run a half-marathon. You record the distance you cover in kilometers and your time in minutes each day. Your goal is to run at the same pace each day as you get closer to race day. You graph your distance and time for the last two days.
Look at the graph of your last two days and decide: Have you met your goal to run at the same pace?