document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1102271>Question 1102271</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ryan took 15 minutes to walk to school at an average speed of 70 m/min.  His brother took 20 minutes to walk the same distance.  Determine his brother’s average speed.  </SPAN>\n" );
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document.write( "This is a good example of inverse variation: the faster you move, the less time it takes; the slower you move, the more time it takes.<br><BR>\n" );
document.write( "Ryan took 15 minutes to walk to school; his brother took 20 minutes.  The ratio of the times is 3:4.<BR>\n" );
document.write( "Since the distance is the same for both of them, the ratio of the speeds is 4:3.<br><BR>\n" );
document.write( "So Ryan's brother's speed is 3/4 of Ryan's speed: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283%2F4%29%2A70+=+52.5 ALIGN=MIDDLE  ALT=\"%283%2F4%29%2A70+=+52.5\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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