document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=813697>Question 813697</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the vertex and the axis of symmetry and graph the function\r<BR>\n" );
document.write( "\n" );
document.write( "f(x)=x^2-9x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #490270 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=490270\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x) = x^2 - 9x<BR>\n" );
document.write( "---<BR>\n" );
document.write( "the above quadratic equation is in standard form, with a=1, b=-9, and c=0<BR>\n" );
document.write( "---<BR>\n" );
document.write( "to solve the quadratic equation, plug this:<BR>\n" );
document.write( "1 -9 0<BR>\n" );
document.write( "into this: https://sooeet.com/math/quadratic-equation-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x-intercepts:<BR>\n" );
document.write( "the roots of the quadratic are real<BR>\n" );
document.write( "9<BR>\n" );
document.write( "0<BR>\n" );
document.write( "( 9, 0 )<BR>\n" );
document.write( "( 0, 0 )<BR>\n" );
document.write( "---<BR>\n" );
document.write( "y-intercept:<BR>\n" );
document.write( "f(0) = 0^2 - 9(0) = 0<BR>\n" );
document.write( "---<BR>\n" );
document.write( "vertex min or max<BR>\n" );
document.write( "vertex is a minimum at ( 4.5, -20.25 )<BR>\n" );
document.write( "---<BR>\n" );
document.write( "axis of symmetry:<BR>\n" );
document.write( "x = 4.5<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Convert fractions, decimals, and percents:<BR>\n" );
document.write( "https://sooeet.com/math/fraction-decimal-percent.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Calculate and graph the linear regression of any data set:<BR>\n" );
document.write( "https://sooeet.com/math/linear-regression.php </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );