Skip Navigation Links
     
   
 Amsco Integrated Algebra I: The Slopes of Parallel and Perpendicular Lines
This is a free lesson from our course in Amsco's Integrated Algebra
 
   
This lesson explains basics of the slope or gradient of parallel and perpendicular lines. Following this, it illustrates with the help of several examples and their solutions how to find the slope of parallel and perpendicular lines. The higher the slope of a graph at a point, the steeper the line is at that point. A negative slope means that the line slopes downwards. To find the slope of a straight-line graph, you’ll find it is often useful to find out what the gradient of a graph is. For a straight-line graph, pick two points on the graph. The slope of the line = (change in y-coordinate)/(change in x-coordinate) . (More text below video...)
<h2> The Slopes of Parallel and Perpendicular Lines</h2> <p> a Line Parallel to an Axis,equation of a line, line equation,graphing,geometry,math,math help,video,amsco,integrated,algebra1</p> <p> what are integers,whole numbers,counting numbers,set,absolute value</p>
People who saw this lesson also found the following lessons useful:
Sets, Relations, and Functions
Graphing a Line Parallel to an Axis
Graphing Linear Functions Using Their Slopes
Graphing First Degree Inequalities in Two Variables
Graphs Involving Exponential Functions
(Continued from above)
Moving forward, to find slope of parallel lines- say l1 and l2 are two parallel lines and m1 is slope of line l1 and m2 is the slope of line l2, then m1 = m2. Further on, to find the slope of perpendicular lines l1 and l2 the statement is true i.e. “if the slope of l1 is m1, the slope of l2 is m2, and l1 is perpendicular to l2, then m1 • m2 = -1”.
For example: two lines are parallel if they have the same slope. Say lines y = 3x + 1 and y = 3x + 4 are parallel, because both have a slope of 3. If two lines are perpendicular i.e. if one is at right angles to another, then their slopes when multiplied together will give -1. Say you need to find the equation of a line perpendicular to y = 4 - 3x. You’ll see this line has slope -3. A perpendicular line shall have a slope of 1/3, as (-3) x (1/3) = -1. Any line with gradient 1/3 will be perpendicular to this line i.e. y = (1/3) x.
The video above explains in detail with the help of several examples.
 
   

As many of you know, Winpossible's online courses use a unique teaching method where an instructor explains the concepts in any given area to you in his/her own voice and handwriting, just like you see your teacher explain things to you on a blackboard in your classroom. This particular lesson includes the teacher's instruction, practice questions as well as end-of-lesson quizzes for practice. As we mentioned above, you can enroll in our online course in Trigonometry by clicking here.

The format of Winpossible's online courses is also very suitable for teachers who are using an interactive whiteboard such as Smartboard on Promethean in their classrooms, because the course lessons can be easily displayed on such interactive whiteboards. Volume pricing is available for schools interested in our online courses. For more information, please contact us at educators@winpossible.com.

 
       
     
 Copyright © Winpossible, 2010 - 2011
Best viewed in 1024x768 & IE 5.0 or later version