document.write( "Question 1136391: In 1965, 42.4% of American adults described themselves as regular cigarette smokers. By 2000, only 24.9% of American adults described themselves as regular cigarette smokers. Write a linear equation that models this decline in smoking. Let x represent the number of years after 1965 and let y represent the percentage of American adults who described themselves as regular cigarette smokers.
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Algebra.Com's Answer #754162 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
use point-slope formula
\n" ); document.write( " $\"+%28+y+-+24.9+%29+%2F+%28+x+-+35+%29+=+%28+42.4+-+24.9+%29+%2F+%28+0+-+35+%29+\"$
\n" ); document.write( " $\"+%28+y+-+24.9+%29+%2F+%28+x+-+35+%29+=+17.5+%2F+%28-35+%29+\"$
\n" ); document.write( " $\"+%28+y+-+24.9+%29+%2F+%28+x+-+35+%29+=+-1%2F2+\"$
\n" ); document.write( " $\"+2%2A%28+y+-+24.9+%29+=+-1%2A%28+x+-+35+%29+\"$
\n" ); document.write( " $\"+2y+-+49.8+=+-x+%2B+35+\"$
\n" ); document.write( " $\"+2y+=+-x+%2B+84.8+\"$
\n" ); document.write( " $\"+y+=+-.5x+%2B+42.4+\"$
\n" ); document.write( "----------------------------
\n" ); document.write( "check answer:
\n" ); document.write( "( 0, 42.4 )
\n" ); document.write( " $\"+y+=+-.5%2A0+%2B+42.4+\"$
\n" ); document.write( " $\"+y+=+42.4+\"$
\n" ); document.write( "OK
\n" ); document.write( "----------
\n" ); document.write( "( 35, 24.9 )
\n" ); document.write( " $\"+y+=+-.5%2A35+%2B+42.4+\"$
\n" ); document.write( " $\"+y+=+-17.5+%2B+42.4+\"$
\n" ); document.write( " $\"+y+=+24.9+\"$
\n" ); document.write( "OK \n" ); document.write( "

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