document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=117583>Question 117583</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Choose an appropriate number of values for x.<BR>\n" );
document.write( "y=4x+1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #85604 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=85604\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since this is a first degree equation (no exponent higher than 1), we know this is the equation of a straight line.  Knowing two points is both necessary and sufficient to define a straight line in a plane, therefore the appropriate number of values to select for x in order to determine the necessary and sufficient points to plot when graphing this line is 2. </SPAN>\n" );
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