document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=169819>Question 169819</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car travels at a steady rate of 60 miles per hour.  Identify the in depednt and dependent variables.  Describe the domain and range.  Write to describe the situation.<BR>\n" );
document.write( "Thanks for all those who help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #125207 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=125207\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since we're dealing with speed, let's use the distance-rate-time formula <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=rt ALIGN=MIDDLE  ALT=\"d=rt\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=rt ALIGN=MIDDLE  ALT=\"d=rt\"   DISABLED_style= \"max-width:90%; height:auto;\" > Start with the given formula\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=60t ALIGN=MIDDLE  ALT=\"d=60t\"   DISABLED_style= \"max-width:90%; height:auto;\" > Plug in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=60 ALIGN=MIDDLE  ALT=\"r=60\"   DISABLED_style= \"max-width:90%; height:auto;\" > (this is the speed/rate)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "So to find the distance, simply plug in a time value. This means that the time \"t\" is independent (since the distance does NOT affect the time). However, the distance \"d\" is dependent since the time value \"t\" does affect the distance \"d\"\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Domain:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Since a negative time doesn't make sense, this means that the time values must be positive (or zero). So the domain is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%3E=0 ALIGN=MIDDLE  ALT=\"t%3E=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Range: \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Because the domain is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%3E=0 ALIGN=MIDDLE  ALT=\"t%3E=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >, this makes the range <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%3E=0 ALIGN=MIDDLE  ALT=\"d%3E=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >. This makes sense also since a negative distance isn't allowed either. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );