document.write( "Question 32842: I am struggling with this word problem:
\n" ); document.write( "Business and finance. The revenue for a sandwich shop is directly proportional to its advertising budget. When the owner spent $2000 a month on advertising, the revenue was $120,000. If the revenue is now $180,000, how much is the owner spending on advertising? \n" ); document.write( "
Algebra.Com's Answer #19259 by sarah_adam(201)\"\" \"About 
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First, we set up our general equation. Because y is directly proportional to x, we have: y = cx\r
\n" ); document.write( "\n" ); document.write( "where c is the constant of proportionality. In other words, when x goes up, y goes up, and when x goes down, y goes down. \r
\n" ); document.write( "\n" ); document.write( "so here lets assume when x = 2000 , y = 120,000
\n" ); document.write( "so we need to find the value of x when y = 180,000\r
\n" ); document.write( "\n" ); document.write( "y = cx
\n" ); document.write( "120,000 = c (2000)
\n" ); document.write( "c = 120,000/2000 = 60\r
\n" ); document.write( "\n" ); document.write( "therefore when c = 60 and y = 180,000
\n" ); document.write( "180,000 = 60 (x)
\n" ); document.write( "x = 180,000/60 = 3,000\r
\n" ); document.write( "\n" ); document.write( "When the revenue is 180,000 the amount spent on advertising is $3000\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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