SOLUTION: Hello. My name is Marcus Alvarez. I am very happy that I found this website. I really need help on graphing inequalities. I understand the concept, but the trick questions annoy me

Algebra ->  Graphs -> SOLUTION: Hello. My name is Marcus Alvarez. I am very happy that I found this website. I really need help on graphing inequalities. I understand the concept, but the trick questions annoy me      Log On


   

Question 70269This question is from textbook Pre-Algebra
: Hello. My name is Marcus Alvarez. I am very happy that I found this website. I really need help on graphing inequalities. I understand the concept, but the trick questions annoy me. I need help with -y<-x . I also need to understand how to graph that problem.
Thank You
Marcus Alvarez This question is from textbook Pre-Algebra

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The equation -y+%3C+-x can be simplified a little
by multiplying both sides by -1. If it was an equality
instead of an inequality, that's all you'd have to do.
When you multiply both sides by -1 in this case, you have
to reverse the inequality sign.
-1%2A%28-y%29+%3E+-1%2A%28-x%29
y+%3E+x This equation is exactly equivilant to the
one you started with. To support the argument, I'll
try some values
-y+%3C+-x
------------
y = 10
x = 5
equation is true
y = 5
x = -1
equation is true
now try the other equation
y+%3E+x
-----------
y = 10
x = 5
equation is true
y = 5
x = -1
equation is true
If it's true for one, it's true for the other
If it's false for one, it's false for the other
To graph, y+%3E+x is just everthing above the
line that goes through the origin with a +1 slope.