document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=103943>Question 103943</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0495384976/algebrahomeworkh>intermediate algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Find the domain and the range after graphing: y= x2 - 1\r<BR>\n" );
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document.write( "I am not understanding the process in which you find the domain and the range. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #75623 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=75623\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the domain and the range after graphing: y= x^2 - 1 \r<BR>\n" );
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document.write( "Domain:<BR>\n" );
document.write( "Start with the assumption that the domain is \"all Real Numbers\".<BR>\n" );
document.write( "Then look at your equation to see if certain forms there restrict<BR>\n" );
document.write( "the values of \"x\":<BR>\n" );
document.write( "Examples: <BR>\n" );
document.write( " 1/(x-2) which means x cannot \"2\"<BR>\n" );
document.write( " sqrt(x-2) which requires that x be >=2 <BR>\n" );
document.write( " log(x-2) which requires that x be >=2<BR>\n" );
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document.write( "Your problem:<BR>\n" );
document.write( "None of these restrictions are present so the domain is \"All Real Numbers\".<BR>\n" );
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document.write( "Range:<BR>\n" );
document.write( "Your problem:<BR>\n" );
document.write( "y=x^2-1<BR>\n" );
document.write( "For all Real numbers, x^2 is >=0<BR>\n" );
document.write( "So for x^2-1, y will be >=-1<BR>\n" );
document.write( "So the range is \"All Real Numbers >=-1\"<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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