document.write( "Question 65116: graph\r
\n" ); document.write( "\n" ); document.write( "F(x) = x-2 there is a line under x-2
\n" ); document.write( " x+4
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Algebra.Com's Answer #45699 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
graph
\n" ); document.write( "\"F%28x%29=%28x-2%29%2F%28x%2B4%29\"
\n" ); document.write( "Because the leading terms in the denominator and numerator have the same degree and coefficients, there is a horizontal asymptote of y=1/1=1. I usually draw a faint dashed line for the asymptotes, because your graph can't equal that.
\n" ); document.write( "There is a vertical asymptote where the rational function is undefined (where the denominator=0).
\n" ); document.write( "The vertical asymptote is:
\n" ); document.write( "x+4=0
\n" ); document.write( "x+4-4=0-4
\n" ); document.write( "x=-4 Draw a faint dashed line there (unfortunatley this program is going to draw a solid dashed line there.)
\n" ); document.write( "Pick two numbers on both sides of the asymptote to plot.
\n" ); document.write( "If x=-8
\n" ); document.write( "\"f%28-8%29=%28-8-2%29%2F%28-8%2B4%29\"
\n" ); document.write( "\"f%28-8%29=-10%2F%28-4%29\"
\n" ); document.write( "\"f%28-8%29=5%2F2\" or 2.5
\n" ); document.write( "Plot (-8,5/2)
\n" ); document.write( "If x=-6
\n" ); document.write( "\"f%28-6%29=%28-6-2%29%2F%28-6%2B4%29\"
\n" ); document.write( "\"f%28-6%29=-8%2F%28-2%29\"
\n" ); document.write( "\"f%28-6%29=4\"
\n" ); document.write( "Plot (-6,4)
\n" ); document.write( "If x=-2
\n" ); document.write( "\"f%28-2%29=%28-2-2%29%2F%28-2%2B4%29\"
\n" ); document.write( "\"f%28-2%29=-4%2F2\"
\n" ); document.write( "\"f%28-2%29=-2\"
\n" ); document.write( "Plot (-2,-2)
\n" ); document.write( "If x=0
\n" ); document.write( "\"f%280%29=%280-2%29%2F%280%2B4%29\"
\n" ); document.write( "\"f%280%29=-2%2F4\"
\n" ); document.write( "\"f%280%29=-1%2F2\"
\n" ); document.write( "Plot (0,-1/2)
\n" ); document.write( "This equation has an x-intercept when the numerator=0.
\n" ); document.write( "x-2=0
\n" ); document.write( "x-2+2=0+2
\n" ); document.write( "x=2 Plot (2,0)
\n" ); document.write( "After you connect the points remembering not to cross the asymptotes you get this: Note this program draws in the vertical asymptote x=-4, it is not part of the graph.
\n" ); document.write( "\"graph%28300%2C200%2C-10%2C10%2C-10%2C10%2C%28x-2%29%2F%28x%2B4%29%29\"
\n" ); document.write( "Happy Calculating!!!
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