document.write( "Question 68131: if f (x) = 4x-3, find the following\r
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Algebra.Com's Answer #48407 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
if f(x) = 4x-3, find the following\r\n" );
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document.write( "  f(-1)\r\n" );
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document.write( "These are function notation problems.\r\n" );
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document.write( "Please help\r\n" );
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document.write( "You will find this to be real easy.\r\n" );
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document.write( "Notice the difference between\r\n" );
document.write( "the notations \" f(x) \" and \" f(-1)\".\r\n" );
document.write( "The first one has an x in the \r\n" );
document.write( "parentheses and the second one has\r\n" );
document.write( "a -1 in the parentheses. This means\r\n" );
document.write( "that you substitute (-1) for x in\r\n" );
document.write( "the right side of f(x).\r\n" );
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document.write( "  f( x) = 4x    - 3\r\n" );
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document.write( "  f(-1) = 4(-1) - 3\r\n" );
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document.write( "Then you simplify the right side:\r\n" );
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document.write( "  f(-1) = -4 - 3\r\n" );
document.write( "  f(-1) = -7\r\n" );
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document.write( "So the function notation just has\r\n" );
document.write( "a parentheses in which you put the\r\n" );
document.write( "number you have to substitute for x.\r\n" );
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document.write( "Whatever you see in the parentheses\r\n" );
document.write( "of \"f(  )\", that's what you are to\r\n" );
document.write( "substitute for x in the right side.\r\n" );
document.write( "This is probably one of the easiest\r\n" );
document.write( "things you'll study in math.\r\n" );
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document.write( "Edwin
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