document.write( "Question 177160: Suppose that the monthly cost of a long-distance phone plan (in dollars) is a linear function of the total calling time (in minutes). When graphed, the function gives a line with a slope of 0.09. \r
\n" ); document.write( "\n" ); document.write( "The monthly cost for 35 minutes of calls is $15.94. What is the monthly cost for 29 minutes of calls? \n" ); document.write( "
Algebra.Com's Answer #132254 by ankor@dixie-net.com(22740)\"\" \"About 
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Suppose that the monthly cost of a long-distance phone plan (in dollars) is a linear function of the total calling time (in minutes). When graphed, the function gives a line with a slope of 0.09.
\n" ); document.write( "The monthly cost for 35 minutes of calls is $15.94. What is the monthly cost for 29 minutes of calls?
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\n" ); document.write( "write an equation using the point/slope formula y-y1 = m(x-x1)
\n" ); document.write( "from the problem; m = .09, x1 = 35, y1 = 15.94
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\n" ); document.write( "y - 15.94 = .09(x - 35)
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\n" ); document.write( "y - 15.94 = .09x - 3.15
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\n" ); document.write( "y = .09x - 3.15 + 15.94
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\n" ); document.write( "y = .09x + 12.79
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\n" ); document.write( "What is the monthly cost for 29 minutes of calls?
\n" ); document.write( "substitute 29 for x in the above equation
\n" ); document.write( "y = .09(29) + 12.79
\n" ); document.write( "y = 2.61 + 12.79
\n" ); document.write( "y = $15.40 for 29 min
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