document.write( "Question 1205068: A city taxi charges $2.50/km. A 6km ride costs $22.
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Algebra.Com's Answer #841691 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "C(d) = (22-6*2.50) + 2.50*d = (22-15) + 2.50*d = 7 + 2.50 *d  dollars.\r\n" );
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document.write( "Here 22-6*50 = 22-15 = 7 dollars is the constant part of the cost.  \r\n" );
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document.write( "     Sometime, they call it \"the cost to turn on the counter\".\r\n" );
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document.write( "2.50*d is the variable part of the cost.\r\n" );
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document.write( "ANSWER.  The cost function is  C(d) = 7 + 2.50 *d  dollars, where d is the travel distance.\r\n" );
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