document.write( "Question 621207: Suppose a market research company finds that at p=$20, they would sell x=42 tiles each month. If they lower the price to p=$10, then more people would purchase the tile and they can expect to sellx=52 tiles in a month. Find the equation of the line for the demand equation. \n" ); document.write( "

Algebra.Com's Answer #390635 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
I would plot $\"p\"$ , price/tile on the vertical axis and
\n" ); document.write( "tiles sold/month on the horizontal
\n" ); document.write( "You are given 2 points on a straight line:
\n" ); document.write( "( 42, 20 )
\n" ); document.write( "( 52, 10 )
\n" ); document.write( "Use the point-slope formula
\n" ); document.write( " $\"+%28+p+-+10+%29+%2F+%28+x+-+52+%29+=+%28+20+-+10+%29+%2F+%28+42+-+52+%29+\"$
\n" ); document.write( " $\"++%28+p+-+10+%29+%2F+%28+x+-+52+%29+=+10+%2F+%28-10%29+\"$
\n" ); document.write( " $\"++%28+p+-+10+%29+%2F+%28+x+-+52+%29+=+-1+\"$
\n" ); document.write( " $\"+p+-+10+=+-x+%2B+52+\"$
\n" ); document.write( " $\"+p+=+-x+%2B+62+\"$
\n" ); document.write( "Here's a plot:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-10%2C+100%2C+-10%2C+100%2C+-x+%2B+62+%29+\"$ \n" ); document.write( "

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