document.write( "Question 278482: How do you solve questions like f(0)=2, f(2)=4 and write an equation for the linear function? \n" ); document.write( "
Algebra.Com's Answer #202647 by Edwin McCravy(20055)\"\" \"About 
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How do you solve questions like f(0)=2, f(2)=4 and write an equation for the linear function?
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document.write( "That's the same problem as \r\n" );
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document.write( "Find the equation of the line that passes through the\r\n" );
document.write( "two points (0,2) and (2,4)\r\n" );
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document.write( "except that when you finish you write f(x) instead of y.\r\n" );
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document.write( "Use the slope formula:\r\n" );
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document.write( "\"m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29\"\r\n" );
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document.write( "\"m=%284-2%29%2F%282-0%29\"\r\n" );
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document.write( "\"m=2%2F3\"\r\n" );
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document.write( "\"m=1\"\r\n" );
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document.write( "Use the point slope formula:\r\n" );
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document.write( "\"y-y%5B1%5D=m%28x-x%5B1%5D%29\"\r\n" );
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document.write( "\"y-2=1%28x-0%29\"\r\n" );
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document.write( "\"y-2=1%28x%29\"\r\n" );
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document.write( "\"y-2=x\"\r\n" );
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document.write( "\"y=x%2B2\"\r\n" );
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document.write( "Change y to f(x)\r\n" );
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document.write( "f(x) = x + 2\r\n" );
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document.write( "Edwin
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