document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=303656>Question 303656</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If you are traveling at a constant speed, the distance you travel is directly proportional to your travel time. Suppose you walk 3 miles in 1 1/2 hours. How far would you walk in 1 hour? How long would it take to walk 5 miles?\r<BR>\n" );
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document.write( "I know the equation is y=kx </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #217610 by </B><A HREF=/tutors/aboutme.mpl?userid=graphmatics><B>graphmatics(170)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=graphmatics><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=graphmatics><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=217610\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You are correct. Your expression y=kx is the same as the problem sentence, \"If you are traveling at a constant speed, the distance you travel is directly proportional to your travel time\". Now the question is what are the variables y,k, and x. A closer look to this sentence show y is the distance traveled, k is the speed and x is the time. Because you walked 3 miles (distance) in 1.5 hours it must be true that:<BR>\n" );
document.write( "3 = k*(1.5)\r<BR>\n" );
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document.write( "So<BR>\n" );
document.write( "k = 3/1.5 = 2<BR>\n" );
document.write( "So the equation is the same as:<BR>\n" );
document.write( "y = 2x<BR>\n" );
document.write( "if x, the time, is 1 hour then we substitude x = 1 to get the distance y:\r<BR>\n" );
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document.write( "y = 2*(1) = 2 </SPAN>\n" );
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