document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=929047>Question 929047</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Susan is writing a linear equation for the cost of her cell phone plan. In the first month, she talks for 52 minutes and is charged $19.41. In the second month, she talks for 380 minutes and is charged $45.65. \r<BR>\n" );
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document.write( "A) How much money does Susan's cell phone company charge for each minute? <BR>\n" );
document.write( "B) Write an equation that Susan can use to determine the cost of her cell phone plan, y, as it relates to the number of minutes used, x. <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #564097 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=564097\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 52 19.41<BR>\n" );
document.write( "380 45.65<BR>\n" );
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document.write( "slope = m = dy/dx<BR>\n" );
document.write( "m = (45.65 - 19.41)/(380 - 52)<BR>\n" );
document.write( "m = 0.08<BR>\n" );
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document.write( "y - 45.65 = 0.08(x - 380)<BR>\n" );
document.write( "y - 45.65 = 0.08x - 380*0.08<BR>\n" );
document.write( "y = 0.08x - 380*0.08 + 45.65<BR>\n" );
document.write( "y = 0.08x + 15.25<BR>\n" );
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document.write( "answer:<BR>\n" );
document.write( "A) charge for each minute = 8 cents<BR>\n" );
document.write( "B) y = 0.08x + 15.25<BR>\n" );
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document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
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document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Convert fractions, decimals, and percents:<BR>\n" );
document.write( "https://sooeet.com/math/fraction-decimal-percent.php<BR>\n" );
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document.write( "Calculate and graph the linear regression of any data set:<BR>\n" );
document.write( "https://sooeet.com/math/linear-regression.php </SPAN>\n" );
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