document.write( "Question 309799: The total sales made by a salesperson was $25,000 after 3 months and $68,000 after 23 months. Using an equation for the line whose graph depicts this data, predict the total sales after 40 months. \n" ); document.write( "

Algebra.Com's Answer #221649 by checkley77(12844) $\"\"$ $\"About$

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(3,25) (23,68)
\n" ); document.write( "Y=mX+b m=SLOPE &b=THE y INTERCEPT.
\n" ); document.write( "SLOPE=(Y2-Y1)/(X2-X1)=(68-25)/(23-3)=43/20 IS THE SLOPE OF THE LINE.
\n" ); document.write( "25=43/25*3+b
\n" ); document.write( "25=129/25+b
\n" ); document.write( "b=25-129/25
\n" ); document.write( "b=(25*25-129)/25
\n" ); document.write( "b=(625-129)/25
\n" ); document.write( "b=496/25
\n" ); document.write( "Y=43/25x+496/25 is the line equation for this problem.
\n" ); document.write( " $\"+graph%28+300%2C+200%2C+-6%2C+50%2C+-10%2C+100%2C+43x%2F25+%2B496%2F25%29+\"$ (graph 300x200 pixels, x from -6 to 50, y from -10 to 100, 43x/25 +496/25).
\n" ); document.write( "In the 40th month the total sales should be:
\n" ); document.write( "Y=43/25*40+496/25
\n" ); document.write( "Y=1,720/25+19.84
\n" ); document.write( "Y=68.8+19.84
\n" ); document.write( "Y=88.64 OR $88,640.00 \n" ); document.write( "

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