Justin L. answered • 09/26/13
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A Personalized Approach to a Standardized Education
1) solve for y so you can graph the line
y>-2x+5
2) graph the line --- if its less than or greater than make it a dotted line,
if ist less than or equal to or greater than or equal to then make it a solid line
3) pick a test point, something easy like (0,0) and plug it into the inequality
0>-2(0) + 5
0 > 5 now is 0 bigger than 5???? no, so the side of the line that has (0,0) is no good. so you want to shade the OTHER side of the line bc the points on that side will make your inequality true
and that should be it
Ross D.
so which is correct dashed line or solid line on '>' side ? you have me confused now
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09/26/13
Justin L.
I tried to leave a comment a while ago to clarify, but i dont see that its showing up. In the instance that we had of less than < (same rule for greater than >) It is a dashed, dotted, or broken line. Remember when we picked a point (0,0) to test? We plugged in the x and y values to see if the inequality was true. Well, in the less than and greater than instances, a point on the line (x,y) will NOT make the inequality true, thats why it has to be dashed or dotted.
If its greater than or equal to, then it would be a solid line.
http://www.regentsprep.org/Regents/math/ALGEBRA/AE85/GrIneqa.htm
If you get stuck again feel free to send me a message, I don't want you to get confused by people posting on this forum that may not be knowledgeable on the subject.
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09/26/13
Imtiazur S.
tutor
I am the source of the confusion and let me clear the confusion by saying I was wrong. I stand corrected. If it is pure Less than or Greater Than it should be a dotted line indicating that the points on the line do not belong in the set. I wish I could take back my earlier comment.
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09/27/13
Imtiazur S.
if ist less than or equal to or greater than or equal to then make it a solid line"
09/26/13