document.write( "Question 177423: I have worked this for two hours and I give up. I keep getting it wrong. Could somebody please help me today?
\n" ); document.write( "Suppose 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 og 0.12. The monthly cost for 41 minutes is 18.73. What is the monthly cost for 48 minutes? \n" ); document.write( "
Algebra.Com's Answer #132456 by stanbon(75887)\"\" \"About 
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Suppose 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 og 0.12. The monthly cost for 41 minutes is 18.73. What is the monthly cost for 48 minutes?
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\n" ); document.write( "cost = slope*(minutes) = intercept
\n" ); document.write( "slope = 0.12 and you have the pair (41,18.73)
\n" ); document.write( "Substitute the pair into the equation to solve for the intercept value:
\n" ); document.write( "18.73 = 0.12*41 + intercept
\n" ); document.write( "intercept = 18.73 - 4.92
\n" ); document.write( "intercept = 13.81
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\n" ); document.write( "Equation:
\n" ); document.write( "C(x) = 0.12x + 13.81
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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