document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1005651>Question 1005651</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The function y = 3.50x + 2 represents the total amount of money, y,<BR>\n" );
document.write( "saved over x weeks.<BR>\n" );
document.write( "What is true about the function?<BR>\n" );
document.write( "A It is linear because it is always increasing.<BR>\n" );
document.write( "B It is linear because it increases at a constant rate.<BR>\n" );
document.write( "C It is nonlinear because it is always increasing.<BR>\n" );
document.write( "D It is nonlinear because it increases at a constant rate. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #621812 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=621812\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> it is linear because it has a constant difference each time.\r<BR>\n" );
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document.write( "the difference can be positive or negative, but it will be constant.\r<BR>\n" );
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document.write( "they are referring to this constant difference when they say it is increasing at a constant rate.\r<BR>\n" );
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document.write( "selection B is the correct choice.\r<BR>\n" );
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document.write( "the function is:\r<BR>\n" );
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document.write( "y = 3.50 * x + 2<BR>\n" );
document.write( "when x = 0, y = 0*3.50 + 2 = 2<BR>\n" );
document.write( "when x = 1, y = 1*3.50 + 2 = 5.50<BR>\n" );
document.write( "when x = 2, y = 2*3.50 + 2 = 9.00<BR>\n" );
document.write( "when x = 3, y = 3*3.50 + 2 = 12.50\r<BR>\n" );
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document.write( "every time x increases by 1, y increases by 3.50.\r<BR>\n" );
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document.write( "3.50 is the constant rate of increase in this problem.\r<BR>\n" );
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document.write( "graphing of a linear function results in a straight line.\r<BR>\n" );
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document.write( "the graph of this function is shown below:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28600%2C600%2C-5%2C5%2C-15%2C15%2C3.5x%2B2%29 ALIGN=MIDDLE  ALT=\"graph%28600%2C600%2C-5%2C5%2C-15%2C15%2C3.5x%2B2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "here's a good refernece on linear versus non-linear functions.\r<BR>\n" );
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document.write( "<a  rel=nofollow HREF= \"http://www.charleston.k12.il.us/cms/Teachers/math/PreAlgebra/paunit3/L3-3.PDF\" target = \"_blank\">http://www.charleston.k12.il.us/cms/Teachers/math/PreAlgebra/paunit3/L3-3.PDF</a>\r<BR>\n" );
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document.write( " </SPAN>\n" );
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