SOLUTION: 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. Wr

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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.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
use point-slope formula
+%28+y+-+24.9+%29+%2F+%28+x+-+35+%29+=+%28+42.4+-+24.9+%29+%2F+%28+0+-+35+%29+
+%28+y+-+24.9+%29+%2F+%28+x+-+35+%29+=+17.5+%2F+%28-35+%29+
+%28+y+-+24.9+%29+%2F+%28+x+-+35+%29+=+-1%2F2+
+2%2A%28+y+-+24.9+%29+=+-1%2A%28+x+-+35+%29+
+2y+-+49.8+=+-x+%2B+35+
+2y+=+-x+%2B+84.8+
+y+=+-.5x+%2B+42.4+
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check answer:
( 0, 42.4 )
+y+=+-.5%2A0+%2B+42.4+
+y+=+42.4+
OK
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( 35, 24.9 )
+y+=+-.5%2A35+%2B+42.4+
+y+=+-17.5+%2B+42.4+
+y+=+24.9+
OK