document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=189525>Question 189525</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780078738302/algebrahomeworkh>Algebra 2</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I need help writing an exponential function whose graph passes through the points (0,-5) and (-2,-20). </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #142215 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=142215\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a general form would be ___ y = m * n^x\r<BR>\n" );
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document.write( "for the first point ___ -5 = m * n^0 ___ -5 = m * 1 ___ -5 = m\r<BR>\n" );
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document.write( "for the second point ___ -20 = -5 * n^-2 ___ 4 = n^-2 ___ 1/4 = n^2 ___ 1/2 = n\r<BR>\n" );
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document.write( "so the function is ___ y = -5 * (1/2)^x\r<BR>\n" );
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document.write( "since the base for the exponent is fractional (<1), the function represents exponential decay </SPAN>\n" );
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