document.write( "Question 844047: The cost of making a dress is partly constant and partly varies with the amount of time it takes to make the dress if the dress takes 3 hours to make, it costs 2700naira. If it takes 5 hours to make the dress, it costs 3100naira. Find the cost if it takes one and a half hours to make the dress. \n" ); document.write( "

Algebra.Com's Answer #508494 by josmiceli(19441) $\"\"$ $\"About$

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Plot cost, $\"C\"$ on the vertical axis
\n" ); document.write( "Plot time in hours, $\"t\"$ on the horizontal axis
\n" ); document.write( "Use the general point-slope formula
\n" ); document.write( " $\"+%28+C+-+2700+%29+%2F+%28+t+-+3+%29+=+%28+3100+-+2700+%29+%2F++%28+5+-+3+%29+\"$
\n" ); document.write( " $\"+%28+C+-+2700+%29+%2F+%28+t+-+3+%29+=+400+%2F++2+\"$
\n" ); document.write( " $\"+%28+C+-+2700+%29+%2F+%28+t+-+3+%29+=+200+\"$
\n" ); document.write( " $\"+C+-+2700+=+200%2A%28+t+-+3+%29+\"$
\n" ); document.write( " $\"+C+-+2700+=+200t+-+600+\"$
\n" ); document.write( " $\"+C+=+200t+%2B+2100+\"$
\n" ); document.write( "-----------------------
\n" ); document.write( "If $\"+t+=+1.5+\"$ ,
\n" ); document.write( " $\"+C+=+200%2A1.5+%2B+2100+\"$
\n" ); document.write( " $\"+C+=+2400+\"$ naira
\n" ); document.write( "------------------------
\n" ); document.write( "Check the equation:
\n" ); document.write( " $\"+C+=+200t+%2B+2100+\"$
\n" ); document.write( "( 5, 3100 )
\n" ); document.write( " $\"+3100+=+200%2A5+%2B+2100+\"$
\n" ); document.write( " $\"+3100+=+1000+%2B+2100+\"$
\n" ); document.write( " $\"+3100+=+3100+\"$
\n" ); document.write( "OK
\n" ); document.write( "You can check ( 2700, 3 )\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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