document.write( "Question 186718This question is from textbook mathematical analysis
\n" ); document.write( ": an advertiser goes to a printer and is charged $79 for 100 copies of one flyer and $88 for 400 copies of another flyer. this printer charges a fixed setup cost plus a charge for every copy of single-page flyers. find a function that describes the cost of a printing job, if x is the number of copies made.\r
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\n" ); document.write( "and please clear explaination.. Thank you so much ! \n" ); document.write( "
Algebra.Com's Answer #139976 by scott8148(6628)\"\" \"About 
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this is a linear function of the type y=mx+b, where the y-intercept (b) is the setup cost
\n" ); document.write( "and the slope (m) is the cost per copy\r
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\n" ); document.write( "\n" ); document.write( "you have two points on the line, (100,79) and (400,88)
\n" ); document.write( "so you can find the equation\r
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\n" ); document.write( "\n" ); document.write( "first, the slope ___ m = (88-79)/(400-100) ___ m = 9/300 ___ m = .03
\n" ); document.write( "so each copy costs 3 cents\r
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\n" ); document.write( "\n" ); document.write( "substituting ___ 79 = .03(100) + b ___ 79 = 3 + b ___ 76 = b
\n" ); document.write( "so the setup cost is $76\r
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\n" ); document.write( "\n" ); document.write( "the function is ___ (cost) = .03(copies) + 76 \n" ); document.write( "
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