document.write( "Question 710958: Hi I am trying to understand how to graph y>3x. I am trying to graph inequalities in two variables and was sick from school today and only need help in 2 or 3 problems so I can do the rest on my own. If you could help me it would be greatly appreciated and thank you very much. \n" ); document.write( "
Algebra.Com's Answer #437253 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Think of the inequality this way:
\n" ); document.write( "If you combine:
\n" ); document.write( "\"+y+%3E+3x+\"
\n" ); document.write( "\"+y+=+3x+\"
\n" ); document.write( "\"+y+%3C+3x+\"
\n" ); document.write( "The entire x-y plane is a possible solution
\n" ); document.write( "If you just say
\n" ); document.write( "\"+y+%3E+3x+\",
\n" ); document.write( "that allows every point above the line \"+y+=+3x+\",
\n" ); document.write( "not including the line itself.
\n" ); document.write( "If you say
\n" ); document.write( "\"+y+%3C+3x+\"
\n" ); document.write( "that allows every point below the line \"+y+=+3x+\",
\n" ); document.write( "not including the line itself.
\n" ); document.write( "When you combine all three, all points in the x-y plane
\n" ); document.write( "are possible solutions
\n" ); document.write( "--------------------
\n" ); document.write( "Suppose you have the inequality
\n" ); document.write( "\"+y+%3E7+\"
\n" ); document.write( "then, every point above the horizontal line
\n" ); document.write( "\"+y+=+7+\" is a possible solution
\n" ); document.write( "\"+y+%3C+7+\" allows every point below this line
\n" ); document.write( "\"+y+=+7+\" is the horizontal line itself
\n" ); document.write( "Combine all three, and you have the entire x-y plane
\n" ); document.write( "----------------
\n" ); document.write( "Suppose you have
\n" ); document.write( "\"+y+%3E+x+\"
\n" ); document.write( "\"+y+%3E+-x+\"
\n" ); document.write( "You now have 2 conditions. You are EXcluding the following regions:
\n" ); document.write( "\"+y+=+x+\"
\n" ); document.write( "\"+y+%3C+x+\"
\n" ); document.write( "\"+y+=+-x+\"
\n" ); document.write( "\"+y+%3C+-x+\"
\n" ); document.write( "the possible solutions are now limited to the center upper region that
\n" ); document.write( "satisfies both conditions:
\n" ); document.write( "\"+graph%28+300%2C+300%2C+-10%2C+10%2C+-10%2C+10%2C+x%2C+-x%29+\"
\n" ); document.write( "Hope this helps\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );