►This site was originally created for my kids and their cousins, because we did science together. We eventually added more friends and I ended up having science classes for five years. I am no longer adding to the site (since 2014), but will leave it up for others' use. I do post to facebook occasionally if I come across something to share. =)

►Please accept my apology for any broken links or videos that do not work. I am always disappointed when people take down their videos from YouTube. It makes it hard to find just the right replacement. And because the videos were posted years ago, I usually have no recollection of what the video was about.
I kept thinking I would have time after my kids graduated, but life has filled up my free time with new responsibilities. =)

►Please do not email, asking me to post your website link, or to review something to put on my site. Any resources posted on this site are things I had found on my own during my regular searching for material I needed at the time, and liked it well enough to post here. There have never been any affiliates on my site, and as it is no longer active, would not be worthwhile at this point. ;)
Thank you!

Graphing Linear Inequalities

To understand these videos (some go pretty fast), you must fully understand how to solve and graph linear equalities.  You must also know how to solve linear inequalities

You must be familiar with slope-intercept form (y = mx + b), and understand which numbers in the equation are m and b, and how to graph them.  Mark b on the graph, then graph the slope (m) from that point. 
Inequalities are very similar, with only a few differences:
  • It's not a line of solutions as in a linear equation; it is a solid or dashed boundary line that shows on which side all the solutions are.
  • Shade above or below the boundary line, showing on which side all the solutions are.
  • Change the direction of the inequality (>, <) if you divide by a negative number.
►These differences are explained in the fourth video.  It is fast, and it is good to pause the video to read the text on the board.
►Check your work by using (0,0) as a test point.  This will help you know if your answer is correct, and if you forgot to change the direction of the inequality.
These videos cover the same topic, but go about solving in slightly different ways.  I watched all of them, and gleaned a little more from each one.

(1) from YourTeacher.com - graphing using a table



(2) boundary line


(3) graphing using slope-intercept form, y = mx + b


(4) graphing using slope-intercept form.  He is fast, so pause and read the text on the board.


(5) graphing using slope-intercept form



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