document.write( "Question 1172663: Vanessa and her friends are going on a 1000 mile road trip. They intend to drive all the way without stopping. After driving a total of 2 hours, they are 860 miles away from their destination. After driving a total of 11 hours, they are 230 miles away from their destination.\r
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Algebra.Com's Answer #797763 by ikleyn(52790) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "In 9 hours (9 = 11-2 hours), they covered  860 - 230 = 630 miles.\r\n" );
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document.write( "Hence, their average speed was  630/9 = 70 miles per hour.\r\n" );
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document.write( "It means that the linear equation relating D and t is  D = 1000 - 70t  miles.   ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "to the author/(the composer) of this problem --- a POST-SOLUTION note.\r
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document.write( "    Actually, having only one piece of info\r\n" );
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document.write( "        \"After driving a total of 2 hours, they are 860 miles away from their destination\"\r\n" );
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document.write( "    is just ENOUGH to create such a function and to answer the problem's question.\r\n" );
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document.write( "    The other piece of info \r\n" );
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document.write( "        \"After driving a total of 11 hours, they are 230 miles away from their destination\" \r\n" );
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document.write( "    is just EXCESSIVE and UNNECASSARY . . . \r\n" );
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