document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1038909>Question 1038909</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How can I determine if the equation y=3x-5 is a function or not? please I really can't understand math lessons easily please help me thankyou <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #653638 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=653638\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a function relates an input to a single output<BR>\n" );
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document.write( "f(x) = 3x - 5<BR>\n" );
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document.write( "f(1) = -2<BR>\n" );
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document.write( "f(2) = 1<BR>\n" );
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document.write( "f(3) = 4<BR>\n" );
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document.write( "a graph of this function is<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+200%2C+-10%2C+10%2C+-10%2C+10%2C+3x+-+5%29+ ALIGN=MIDDLE  ALT=\"+graph%28+300%2C+200%2C+-10%2C+10%2C+-10%2C+10%2C+3x+-+5%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "from the graph, we see that an input (x axis values) are related to a single output (y axis values)<BR>\n" );
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document.write( "note that y = x^2 is not a function since -2 and 2 are related to the same value 4<BR>\n" );
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