document.write( "Question 1150943: A store is having a sale on books. If you buy the first book for $12, each additional book will cost $6. Which formula models this situation?\r
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Algebra.Com's Answer #772526 by ikleyn(52847) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "This function is defined for all integer values of b >= 0.\r\n" );
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document.write( "The formula is in three lines:\r\n" );
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document.write( "          0 dollars,  if b = 0,\r\n" );
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document.write( "f(b) =   12 dollars,  if b = 1\r\n" );
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document.write( "         12 + 6*(b-1) dollars,  if b > 1.\r\n" );
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