document.write( "Question 1100477: Nour drove from the Dead Sea up to Amman, and her altitude increased at a constant rate.
\n" ); document.write( "When she began driving, her altitude was 400 meters below sea level.
\n" ); document.write( "When she arrived in Amman 2 hours later, her altitude was 1000 meters above sea level.
\n" ); document.write( "Let A(t) denote Nour's altitude relative to sea level A (measured in meters) as a function of time t (measured in hours).
\n" ); document.write( "Write the function's formula.
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Algebra.Com's Answer #714984 by ikleyn(52802) $\"\"$ $\"About$

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\n" ); document.write( "Wikipedia article ( https://en.wikipedia.org/wiki/Dead_Sea ) says \r
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document.write( "    The Dead Sea is a salt lake bordered by Jordan to the east and Israel and Palestine to the west. \r\n" );
document.write( "    Its surface and shores are 430.5 metres (1,412 ft) below sea level, Earth's lowest elevation on land.\r\n" );
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document.write( "The formula for Nour's altitude, that the problem is asking for, is\r\n" );
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document.write( "    A(t) = -400 + .\r\n" );
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document.write( "Indeed, it is a linear function of t (t is time in hours), which has the value of -400 meters at t= 0 (when Nour started her move) \r\n" );
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document.write( "and the value of 1000 meters at t = 2 hours, when Nour arrived to Amman.\r\n" );
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document.write( "So the formula satisfies all conditions imposed to the function.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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